Visual Acuity Evaluation Results

Test Image (4K)

Click image to expand/collapse

Leaderboard (4K)

Rank	Model	Provider	Threshold Row	Threshold Size	Mean Accuracy	Attempted Rows
1	GPT-5.4 (original detail)	OpenAI	12	6px	100.0%	12/12
2	Gemini 3 Pro Preview (high res)	Gemini	11	8px	95.0%	12/12
3	GPT-5-MINI (minimal)	OpenAI	10	10px	89.1%	11/12
4T	GPT-4.1-MINI	OpenAI	10	10px	86.7%	12/12
5T	GPT-4.1-MINI (low detail)	OpenAI	10	10px	86.7%	12/12
6	GPT-4.1-MINI (high detail)	OpenAI	10	10px	85.0%	12/12
7	GPT-4.1-NANO (high detail)	OpenAI	10	10px	72.0%	10/12
8	Gemini 3 Pro Preview (medium res)	Gemini	9	12px	97.8%	9/12
9	GPT-4.1-NANO (low detail)	OpenAI	9	12px	48.0%	10/12
10	Gemini 3 Flash Preview (medium res)	Gemini	8	15px	73.3%	12/12
11	Gemini 3 Pro Preview (low res)	Gemini	7	19px	87.5%	8/12
12	Claude Haiku 4 5 20251001	Anthropic	7	19px	74.0%	10/12
13	Gemini 2.5 Pro	Gemini	7	19px	61.8%	11/12
14	Gemini 3 Flash Preview (low res)	Gemini	7	19px	61.7%	12/12
15	GPT-4.1	OpenAI	7	19px	58.3%	12/12
16T	Claude Opus 4 5 20251101	Anthropic	7	19px	56.7%	12/12
17T	GPT-5 (minimal)	OpenAI	7	19px	56.7%	12/12
18T	Claude Sonnet 4 5 20250929	Anthropic	7	19px	55.0%	12/12
19T	GPT-4O (high detail)	OpenAI	7	19px	55.0%	13/12
20	Gemini 2.0 Flash (high res)	Gemini	6	24px	100.0%	6/12
21	Claude Sonnet 4 20250514	Anthropic	6	24px	94.3%	7/12
22	Gemini 2.0 Flash (medium res)	Gemini	6	24px	71.1%	9/12
23	Claude Opus 4 1 20250805	Anthropic	6	24px	64.0%	10/12
24	Gemini 2.5 Flash (no thinking) (medium res)	Gemini	6	24px	56.7%	15/12
25	Gemini 2.5 Pro (low res)	Gemini	6	24px	56.4%	11/12
26T	Gemini 2.0 Flash (low res)	Gemini	6	24px	55.0%	12/12
27T	Gemini 2.5 Flash (no thinking)	Gemini	6	24px	55.0%	20/12
28T	Gemini 2.5 Pro (medium res)	Gemini	6	24px	55.0%	12/12
29	GPT-4O-MINI (high detail)	OpenAI	6	24px	51.7%	14/12
30	GPT-4O-MINI (low detail)	OpenAI	4	38px	42.0%	10/12
31	Grok 4 0709	xAI	3	48px	85.0%	4/12
32T	GPT-4O (low detail)	OpenAI	None	N/A	0.0%	0/12
33T	Gemini 3 Flash Preview (high res)	Gemini	None	N/A	0.0%	0/12

Click a row to see detailed results
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1 GPT-5.4 (original detail)

OpenAI

Threshold Row

100.0%

Mean Accuracy

12/12

Attempted Rows

6px

Smallest Letters

Configuration: image_detail: original, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	C	V	C	V	D	C	5/5 (100%)
11	8px	O	H	S	R	H	O	H	S	R	H	5/5 (100%)
12	6px	C	D	Z	S	H	C	D	Z	S	H	5/5 (100%)

Full Response:

[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "D", "V", "Z", "C"],
  ["N", "V", "D", "N", "S"],
  ["O", "N", "K", "K", "S"],
  ["V", "C", "V", "D", "C"],
  ["O", "H", "S", "R", "H"],
  ["C", "D", "Z", "S", "H"]
]

2 Gemini 3 Pro Preview (high res)

Gemini

Threshold Row

95.0%

Mean Accuracy

12/12

Attempted Rows

8px

Smallest Letters

Configuration: media_resolution: HIGH, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	C	V	C	V	D	C	5/5 (100%)
11	8px	O	H	S	K	H	O	H	S	R	H	4/5 (80%)
12	6px	C	O	Z	V	H	C	D	Z	S	H	3/5 (60%)

Full Response:

Based on the image provided, here are the letters row by row:

1.  ['S', 'D', 'C', 'D', 'Z']
2.  ['C', 'D', 'D', 'O', 'K']
3.  ['C', 'C', 'C', 'O', 'Z']
4.  ['S', 'Z', 'S', 'H', 'D']
5.  ['H', 'D', 'C', 'V', 'S']
6.  ['K', 'D', 'V', 'S', 'D']
7.  ['Z', 'D', 'V', 'Z', 'C']
8.  ['N', 'V', 'D', 'N', 'S']
9.  ['O', 'N', 'K', 'K', 'S']
10. ['V', 'C', 'V', 'D', 'C']
11. ['O', 'H', 'S', 'K', 'H']
12. ['C', 'O', 'Z', 'V', 'H']

3 GPT-5-MINI (minimal)

OpenAI

Threshold Row

89.1%

Mean Accuracy

11/12

Attempted Rows

10px

Smallest Letters

Configuration: reasoning_effort: minimal, image_detail: auto, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	O	C	V	C	V	D	C	4/5 (80%)
11	8px	.	?	?	.	.	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

[
["S", "D", "C", "D", "Z"],
["C", "D", "D", "O", "K"],
["C", "C", "C", "O", "Z"],
["S", "Z", "S", "H", "D"],
["H", "D", "C", "V", "S"],
["K", "D", "V", "S", "D"],
["Z", "D", "V", "Z", "C"],
["N", "V", "D", "N", "S"],
["O", "N", "K", "K", "S"],
["V", "C", "V", "O", "C"],
[".", "?", "?", ".", "."]
]

Note: The smallest/faint letters near the bottom are hard to read; I marked uncertain ones as "?" and a "." where I couldn't discern a letter.

4T GPT-4.1-MINI

OpenAI

Threshold Row

86.7%

Mean Accuracy

12/12

Attempted Rows

10px

Smallest Letters

Configuration: image_detail: auto, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	O	C	V	C	V	D	C	4/5 (80%)
11	8px	O	-	S	-	-	O	H	S	R	H	2/5 (40%)
12	6px	C	-	-	-	-	C	D	Z	S	H	1/5 (20%)

Full Response:

[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "D", "V", "Z", "C"],
  ["N", "V", "D", "N", "S"],
  ["O", "N", "K", "K", "S"],
  ["V", "C", "V", "O", "C"],
  ["O", "-", "S", "-", "-"],
  ["C", "-", "-", "-", "-"]
]

5T GPT-4.1-MINI (low detail)

OpenAI

Threshold Row

86.7%

Mean Accuracy

12/12

Attempted Rows

10px

Smallest Letters

Configuration: image_detail: low, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	O	C	V	C	V	D	C	4/5 (80%)
11	8px	O	S	S	S	O	O	H	S	R	H	2/5 (40%)
12	6px	C	O	I	I	T	C	D	Z	S	H	1/5 (20%)

Full Response:

[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "D", "V", "Z", "C"],
  ["N", "V", "D", "N", "S"],
  ["O", "N", "K", "K", "S"],
  ["V", "C", "V", "O", "C"],
  ["O", "S", "S", "S", "O"],
  ["C", "O", "I", "I", "T"]
]

6 GPT-4.1-MINI (high detail)

OpenAI

Threshold Row

85.0%

Mean Accuracy

12/12

Attempted Rows

10px

Smallest Letters

Configuration: image_detail: high, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	O	C	V	C	V	D	C	4/5 (80%)
11	8px	?	?	S	?	?	O	H	S	R	H	1/5 (20%)
12	6px	C	E	J	L	?	C	D	Z	S	H	1/5 (20%)

Full Response:

[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "D", "V", "Z", "C"],
  ["N", "V", "D", "N", "S"],
  ["O", "N", "K", "K", "S"],
  ["V", "C", "V", "O", "C"],
  ["not sure", "not sure", "S", "not sure", "not sure"],
  ["C", "E", "J", "L", "not sure"]
]

7 GPT-4.1-NANO (high detail)

OpenAI

Threshold Row

72.0%

Mean Accuracy

10/12

Attempted Rows

10px

Smallest Letters

Configuration: image_detail: high, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	c	D	D	D	K	C	D	D	O	K	3/5 (60%)
3	48px	c	c	c	o	Z	C	C	C	O	Z	1/5 (20%)
4	38px	s	z	s	H	D	S	Z	S	H	D	2/5 (40%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	2	D	V	2	C	Z	D	V	Z	C	3/5 (60%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	S	?	O	N	K	K	S	3/5 (60%)
10	10px	V	C	V	O	C	V	C	V	D	C	4/5 (80%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

[
  ["S", "D", "C", "D", "Z"],
  ["c", "D", "D", "D", "K"],
  ["c", "c", "c", "o", "Z"],
  ["s", "z", "s", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["2", "D", "V", "2", "C"],
  ["N", "V", "D", "N", "S"],
  ["O", "N", "K", "S"],
  ["V", "C", "V", "O", "C"]
]

8 Gemini 3 Pro Preview (medium res)

Gemini

Threshold Row

97.8%

Mean Accuracy

9/12

Attempted Rows

12px

Smallest Letters

Configuration: media_resolution: MEDIUM, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	H	S	O	N	K	K	S	4/5 (80%)
10	10px	?	?	?	?	?	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

Based on the visual acuity chart provided, here are the letters row by row. The letters decrease in size, and the last few rows appear as dots which are not legible letters, so they are excluded.

[
  ['S', 'D', 'C', 'D', 'Z'],
  ['C', 'D', 'D', 'O', 'K'],
  ['C', 'C', 'C', 'O', 'Z'],
  ['S', 'Z', 'S', 'H', 'D'],
  ['H', 'D', 'C', 'V', 'S'],
  ['K', 'D', 'V', 'S', 'D'],
  ['Z', 'D', 'V', 'Z', 'C'],
  ['N', 'V', 'D', 'N', 'S'],
  ['O', 'N', 'K', 'H', 'S']
]

9 GPT-4.1-NANO (low detail)

OpenAI

Threshold Row

48.0%

Mean Accuracy

10/12

Attempted Rows

12px

Smallest Letters

Configuration: image_detail: low, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	s	D	c	D	Z	S	D	C	D	Z	3/5 (60%)
2	60px	c	D	D	O	K	C	D	D	O	K	4/5 (80%)
3	48px	c	c	c	o	Z	C	C	C	O	Z	1/5 (20%)
4	38px	s	z	s	H	D	S	Z	S	H	D	2/5 (40%)
5	30px	H	D	c	V	S	H	D	C	V	S	4/5 (80%)
6	24px	K	D	v	s	D	K	D	V	S	D	3/5 (60%)
7	19px	2	D	v	2	c	Z	D	V	Z	C	1/5 (20%)
8	15px	?	v	D	N	s	N	V	D	N	S	2/5 (40%)
9	12px	o	N	K	K	S	O	N	K	K	S	4/5 (80%)
10	10px	?	c	v	o	c	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

[
  ["s", "D", "c", "D", "Z"],
  ["c", "D", "D", "O", "K"],
  ["c", "c", "c", "o", "Z"],
  ["s", "z", "s", "H", "D"],
  ["H", "D", "c", "V", "S"],
  ["K", "D", "v", "s", "D"],
  ["2", "D", "v", "2", "c"],
  ["not sure", "v", "D", "N", "s"],
  ["o", "N", "K", "K", "S"],
  ["not sure", "c", "v", "o", "c"]
]

10 Gemini 3 Flash Preview (medium res)

Gemini

Threshold Row

73.3%

Mean Accuracy

12/12

Attempted Rows

15px

Smallest Letters

Configuration: media_resolution: MEDIUM, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	R	K	R	S	O	N	K	K	S	3/5 (60%)
10	10px	Z	H	V	S	H	V	C	V	D	C	1/5 (20%)
11	8px	N	D	O	V	C	O	H	S	R	H	0/5 (0%)
12	6px	S	K	V	D	S	C	D	Z	S	H	0/5 (0%)

Full Response:

```json
[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "D", "V", "Z", "C"],
  ["N", "V", "D", "N", "S"],
  ["O", "R", "K", "R", "S"],
  ["Z", "H", "V", "S", "H"],
  ["N", "D", "O", "V", "C"],
  ["S", "K", "V", "D", "S"]
]
```

11 Gemini 3 Pro Preview (low res)

Gemini

Threshold Row

87.5%

Mean Accuracy

8/12

Attempted Rows

19px

Smallest Letters

Configuration: media_resolution: LOW, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	?	?	?	?	?	N	V	D	N	S	0/5 (0%)
9	12px	?	?	?	?	?	O	N	K	K	S	0/5 (0%)
10	10px	?	?	?	?	?	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

Based on the provided image, which appears to be a visual acuity chart with rows of decreasing size, here are the letters row by row. The letters become illegible after the 7th row.

[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "D", "V", "Z", "C"],
  ["not sure", "not sure", "not sure", "not sure", "not sure"]
]

12 Claude Haiku 4 5 20251001

Anthropic

Threshold Row

74.0%

Mean Accuracy

10/12

Attempted Rows

19px

Smallest Letters

Configuration: temperature: 1.0, max_tokens: 2000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	O	V	Z	C	Z	D	V	Z	C	4/5 (80%)
8	15px	H	V	U	A	S	N	V	D	N	S	2/5 (40%)
9	12px	C	L	K	L	A	O	N	K	K	S	1/5 (20%)
10	10px	L	L	L	L	L	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

# Letters by Row

```
[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "O", "V", "Z", "C"],
  ["H", "V", "U", "A", "S"],
  ["C", "L", "K", "L", "A"],
  ["L", "L", "L", "L", "L"]
]
```

Note: Some letters in the lower rows are very faint and small, making them difficult to read with complete certainty. If you need clarification on any specific letters, please let me know.

13 Gemini 2.5 Pro

Gemini

Threshold Row

61.8%

Mean Accuracy

11/12

Attempted Rows

19px

Smallest Letters

Configuration: temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	O	V	Z	C	Z	D	V	Z	C	4/5 (80%)
8	15px	?	?	?	?	?	N	V	D	N	S	0/5 (0%)
9	12px	?	?	?	?	?	O	N	K	K	S	0/5 (0%)
10	10px	?	?	?	?	?	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

```
[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "O", "V", "Z", "C"],
  ["not sure", "not sure", "not sure", "not sure", "not sure"],
  ["not sure", "not sure", "not sure", "not sure", "not sure"],
  ["not sure", "not sure", "not sure", "not sure", "not sure"],
  ["not sure", "not sure", "not sure", "not sure", "not sure"]
]
```

14 Gemini 3 Flash Preview (low res)

Gemini

Threshold Row

61.7%

Mean Accuracy

12/12

Attempted Rows

19px

Smallest Letters

Configuration: media_resolution: LOW, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	H	S	O	N	S	N	V	D	N	S	2/5 (40%)
9	12px	?	?	?	?	?	O	N	K	K	S	0/5 (0%)
10	10px	?	?	?	?	?	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

Based on the image provided, here are the letters organized by row. Note that as the rows progress, the font size decreases significantly, making the later rows more difficult to read accurately.

[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "D", "V", "Z", "C"],
  ["H", "S", "O", "N", "S"],
  ["not sure", "not sure", "not sure", "not sure", "not sure"],
  ["not sure", "not sure", "not sure", "not sure", "not sure"],
  ["not sure", "not sure", "not sure", "not sure", "not sure"],
  ["not sure", "not sure", "not sure", "not sure", "not sure"]
]

15 GPT-4.1

OpenAI

Threshold Row

58.3%

Mean Accuracy

12/12

Attempted Rows

19px

Smallest Letters

Configuration: image_detail: auto, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	?	?	?	?	?	N	V	D	N	S	0/5 (0%)
9	12px	?	?	?	?	?	O	N	K	K	S	0/5 (0%)
10	10px	?	?	?	?	?	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

Here is the list of lists representing the letters I see in the image, row by row:

```
[
    ["S", "D", "C", "D", "Z"],
    ["C", "D", "D", "O", "K"],
    ["C", "C", "C", "O", "Z"],
    ["S", "Z", "S", "H", "D"],
    ["H", "D", "C", "V", "S"],
    ["K", "D", "V", "S", "D"],
    ["Z", "D", "V", "Z", "C"],
    ["not sure", "not sure", "not sure", "not sure", "not sure"],
    ["not sure", "not sure", "not sure", "not sure", "not sure"],
    ["not sure", "not sure", "not sure", "not sure", "not sure"],
    ["not sure", "not sure", "not sure", "not sure", "not sure"],
    ["not sure", "not sure", "not sure", "not sure", "not sure"]
]
```

The text becomes difficult to distinguish in the lower rows, so I marked them as "not sure". Let me know if you need anything else!

16T Claude Opus 4 5 20251101

Anthropic

Threshold Row

56.7%

Mean Accuracy

12/12

Attempted Rows

19px

Smallest Letters

Configuration: temperature: 1.0, max_tokens: 2000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	O	V	Z	C	Z	D	V	Z	C	4/5 (80%)
8	15px	?	?	?	?	?	N	V	D	N	S	0/5 (0%)
9	12px	?	?	?	?	?	O	N	K	K	S	0/5 (0%)
10	10px	?	?	?	?	?	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

Looking at the image row by row, here are the letters I can identify:

```python
[
    ["S", "D", "C", "D", "Z"],
    ["C", "D", "D", "O", "K"],
    ["C", "C", "C", "O", "Z"],
    ["S", "Z", "S", "H", "D"],
    ["H", "D", "C", "V", "S"],
    ["K", "D", "V", "S", "D"],
    ["Z", "O", "V", "Z", "C"],
    ["not sure", "not sure", "not sure", "not sure", "not sure"],
    ["not sure", "not sure", "not sure", "not sure", "not sure"],
    ["not sure", "not sure", "not sure", "not sure", "not sure"],
    ["not sure", "not sure", "not sure", "not sure", "not sure"],
    ["not sure", "not sure", "not sure", "not sure", "not sure"]
]
```

The letters become increasingly faint/small in the lower rows (rows 8-12), making them very difficult or impossible to read with certainty.

17T GPT-5 (minimal)

OpenAI

Threshold Row

56.7%

Mean Accuracy

12/12

Attempted Rows

19px

Smallest Letters

Configuration: reasoning_effort: minimal, image_detail: auto, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	S	V	Z	C	Z	D	V	Z	C	4/5 (80%)
8	15px	?	?	?	?	?	N	V	D	N	S	0/5 (0%)
9	12px	?	?	?	?	?	O	N	K	K	S	0/5 (0%)
10	10px	?	?	?	?	?	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "S", "V", "Z", "C"],
  ["not sure", "not sure", "not sure", "not sure", "not sure"],
  ["not sure", "not sure", "not sure", "not sure", "not sure"],
  ["not sure", "not sure", "not sure", "not sure", "not sure"],
  ["not sure", "not sure", "not sure", "not sure", "not sure"],
  ["not sure", "not sure", "not sure", "not sure", "not sure"]
]

18T Claude Sonnet 4 5 20250929

Anthropic

Threshold Row

55.0%

Mean Accuracy

12/12

Attempted Rows

19px

Smallest Letters

Configuration: temperature: 1.0, max_tokens: 2000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	s	Z	s	H	D	S	Z	S	H	D	3/5 (60%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	a	D	K	D	V	S	D	4/5 (80%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	H	?	D	a	s	N	V	D	N	S	1/5 (20%)
9	12px	?	?	?	?	?	O	N	K	K	S	0/5 (0%)
10	10px	?	?	?	?	?	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

Reading the letters row by row from the image:

```
[
  ['S', 'D', 'C', 'D', 'Z'],
  ['C', 'D', 'D', 'O', 'K'],
  ['C', 'C', 'C', 'O', 'Z'],
  ['s', 'Z', 's', 'H', 'D'],
  ['H', 'D', 'C', 'V', 'S'],
  ['K', 'D', 'V', 'a', 'D'],
  ['Z', 'D', 'V', 'Z', 'C'],
  ['H', 'not sure', 'D', 'a', 's'],
  ['not sure', 'not sure', 'not sure', 'not sure', 'not sure'],
  ['not sure', 'not sure', 'not sure', 'not sure', 'not sure'],
  ['not sure', 'not sure', 'not sure', 'not sure', 'not sure'],
  ['not sure', 'not sure', 'not sure', 'not sure', 'not sure']
]
```

19T GPT-4O (high detail)

OpenAI

Threshold Row

55.0%

Mean Accuracy

13/12

Attempted Rows

19px

Smallest Letters

Configuration: image_detail: high, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	O	V	S	D	K	D	V	S	D	4/5 (80%)
7	19px	Z	O	V	Z	C	Z	D	V	Z	C	4/5 (80%)
8	15px	.	.	.	.	.	N	V	D	N	S	0/5 (0%)
9	12px	.	.	.	.	.	O	N	K	K	S	0/5 (0%)
10	10px	.	.	.	.	.	V	C	V	D	C	0/5 (0%)
11	8px	.	.	.	.	.	O	H	S	R	H	0/5 (0%)
12	6px	.	.	.	.	.	C	D	Z	S	H	0/5 (0%)
13	0px	.	.	.	.	.	-	-	-	-	-	0/5 (0%)

Full Response:

```python
[
    ['S', 'D', 'C', 'D', 'Z'],
    ['C', 'D', 'D', 'O', 'K'],
    ['C', 'C', 'C', 'O', 'Z'],
    ['S', 'Z', 'S', 'H', 'D'],
    ['H', 'D', 'C', 'V', 'S'],
    ['K', 'O', 'V', 'S', 'D'],
    ['Z', 'O', 'V', 'Z', 'C'],
    ['.', '.', '.', '.', '.'],
    ['.', '.', '.', '.', '.'],
    ['.', '.', '.', '.', '.'],
    ['.', '.', '.', '.', '.'],
    ['.', '.', '.', '.', '.'],
    ['.', '.', '.', '.', '.']
]
```

20 Gemini 2.0 Flash (high res)

Gemini

Threshold Row

100.0%

Mean Accuracy

6/12

Attempted Rows

24px

Smallest Letters

Configuration: media_resolution: HIGH, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	?	?	?	?	?	Z	D	V	Z	C	0/5 (0%)
8	15px	?	?	?	?	?	N	V	D	N	S	0/5 (0%)
9	12px	?	?	?	?	?	O	N	K	K	S	0/5 (0%)
10	10px	?	?	?	?	?	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

Here are the letters in the image, row by row:

```
[
    ["S", "D", "C", "D", "Z"],
    ["C", "D", "D", "O", "K"],
    ["C", "C", "C", "O", "Z"],
    ["S", "Z", "S", "H", "D"],
    ["H", "D", "C", "V", "S"],
    ["K", "D", "V", "S", "D"]
]
```

21 Claude Sonnet 4 20250514

Anthropic

Threshold Row

94.3%

Mean Accuracy

7/12

Attempted Rows

24px

Smallest Letters

Configuration: temperature: 1.0, max_tokens: 2000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	C	V	Z	V	Z	D	V	Z	C	3/5 (60%)
8	15px	?	?	?	?	?	N	V	D	N	S	0/5 (0%)
9	12px	?	?	?	?	?	O	N	K	K	S	0/5 (0%)
10	10px	?	?	?	?	?	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

Looking at the image row by row, I can see the following letters:

[['S', 'D', 'C', 'D', 'Z'],
['C', 'D', 'D', 'O', 'K'],
['C', 'C', 'C', 'O', 'Z'],
['S', 'Z', 'S', 'H', 'D'],
['H', 'D', 'C', 'V', 'S'],
['K', 'D', 'V', 'S', 'D'],
['Z', 'C', 'V', 'Z', 'V']]

Note: The letters become increasingly faint in the lower rows, and some of the very faint letters in the bottom rows I'm less certain about, but I've provided my best reading of what appears to be visible.

22 Gemini 2.0 Flash (medium res)

Gemini

Threshold Row

71.1%

Mean Accuracy

9/12

Attempted Rows

24px

Smallest Letters

Configuration: media_resolution: MEDIUM, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	?	?	V	Z	?	Z	D	V	Z	C	2/5 (40%)
8	15px	V	D	N	V	D	N	V	D	N	S	0/5 (0%)
9	12px	N	C	S	?	?	O	N	K	K	S	0/5 (0%)
10	10px	?	?	?	?	?	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

Here's the OCR output of the image, represented as a list of lists, row by row:

```
[
    ['S', 'D', 'C', 'D', 'Z'],
    ['C', 'D', 'D', 'O', 'K'],
    ['C', 'C', 'C', 'O', 'Z'],
    ['S', 'Z', 'S', 'H', 'D'],
    ['H', 'D', 'C', 'V', 'S'],
    ['K', 'D', 'V', 'S', 'D'],
    ['not sure', 'not sure', 'V', 'Z', 'not sure'],
    ['V', 'D', 'N', 'V', 'D'],
    ['N', 'C', 'S']
]
```

23 Claude Opus 4 1 20250805

Anthropic

Threshold Row

64.0%

Mean Accuracy

10/12

Attempted Rows

24px

Smallest Letters

Configuration: temperature: 1.0, max_tokens: 2000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	Y	S	D	K	D	V	S	D	4/5 (80%)
7	19px	Z	D	Y	Z	D	Z	D	V	Z	C	3/5 (60%)
8	15px	?	?	?	?	?	N	V	D	N	S	0/5 (0%)
9	12px	?	?	?	?	?	O	N	K	K	S	0/5 (0%)
10	10px	?	?	?	?	?	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

Looking at this image row by row, I can see letters arranged in a grid pattern. Here's what I observe:

```python
[
    ['S', 'D', 'C', 'D', 'Z'],
    ['C', 'D', 'D', 'O', 'K'],
    ['C', 'C', 'C', 'O', 'Z'],
    ['S', 'Z', 'S', 'H', 'D'],
    ['H', 'D', 'C', 'V', 'S'],
    ['K', 'D', 'Y', 'S', 'D'],
    ['Z', 'D', 'Y', 'Z', 'D'],
    ['not sure', 'not sure', 'not sure', 'not sure', 'not sure'],
    ['not sure', 'not sure', 'not sure', 'not sure', 'not sure'],
    ['not sure', 'not sure', 'not sure', 'not sure', 'not sure']
]
```

The first 7 rows contain clearly visible letters, while the last 3 rows appear to have very faint or unclear characters that I cannot confidently identify.

24 Gemini 2.5 Flash (no thinking) (medium res)

Gemini

Threshold Row

56.7%

Mean Accuracy

15/12

Attempted Rows

24px

Smallest Letters

Configuration: thinking_budget: 0, media_resolution: MEDIUM, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	S	Z	V	C	Z	D	V	Z	C	2/5 (40%)
8	15px	O	D	K	V	X	N	V	D	N	S	0/5 (0%)
9	12px	C	V	S	K	O	O	N	K	K	S	1/5 (20%)
10	10px	H	C	D	V	O	V	C	V	D	C	1/5 (20%)
11	8px	S	Z	H	D	S	O	H	S	R	H	0/5 (0%)
12	6px	Z	S	S	Z	D	C	D	Z	S	H	0/5 (0%)
13	0px	Z	O	D	D	Z	-	-	-	-	-	0/5 (0%)
14	0px	V	S	Z	D	S	-	-	-	-	-	0/5 (0%)
15	0px	H	O	D	O	D	-	-	-	-	-	0/5 (0%)

Full Response:

Here are the letters, row by row, as requested:

[['S', 'D', 'C', 'D', 'Z'],
 ['C', 'D', 'D', 'O', 'K'],
 ['C', 'C', 'C', 'O', 'Z'],
 ['S', 'Z', 'S', 'H', 'D'],
 ['H', 'D', 'C', 'V', 'S'],
 ['K', 'D', 'V', 'S', 'D'],
 ['Z', 'S', 'Z', 'V', 'C'],
 ['O', 'D', 'K', 'V', 'X'],
 ['C', 'V', 'S', 'K', 'O'],
 ['H', 'C', 'D', 'V', 'O'],
 ['S', 'Z', 'H', 'D', 'S'],
 ['Z', 'S', 'S', 'Z', 'D'],
 ['Z', 'O', 'D', 'D', 'Z'],
 ['V', 'S', 'Z', 'D', 'S'],
 ['H', 'O', 'D', 'O', 'D']]

25 Gemini 2.5 Pro (low res)

Gemini

Threshold Row

56.4%

Mean Accuracy

11/12

Attempted Rows

24px

Smallest Letters

Configuration: media_resolution: LOW, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	V	Z	C	?	Z	D	V	Z	C	1/5 (20%)
8	15px	?	?	?	?	?	N	V	D	N	S	0/5 (0%)
9	12px	?	?	?	?	?	O	N	K	K	S	0/5 (0%)
10	10px	?	?	?	?	?	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

```json
[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "V", "Z", "C"],
  [],
  [],
  [],
  []
]
```

26T Gemini 2.0 Flash (low res)

Gemini

Threshold Row

55.0%

Mean Accuracy

12/12

Attempted Rows

24px

Smallest Letters

Configuration: media_resolution: LOW, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	?	Z	?	?	?	Z	D	V	Z	C	0/5 (0%)
8	15px	D	V	?	?	?	N	V	D	N	S	1/5 (20%)
9	12px	Z	N	?	?	?	O	N	K	K	S	1/5 (20%)
10	10px	V	D	?	?	?	V	C	V	D	C	1/5 (20%)
11	8px	N	C	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	S	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

Here's the breakdown of the letters in the image, presented as a list of lists, row by row:

```
[['S', 'D', 'C', 'D', 'Z'],
 ['C', 'D', 'D', 'O', 'K'],
 ['C', 'C', 'C', 'O', 'Z'],
 ['S', 'Z', 'S', 'H', 'D'],
 ['H', 'D', 'C', 'V', 'S'],
 ['K', 'D', 'V', 'S', 'D'],
 ['not sure', 'Z'],
 ['D', 'V'],
 ['Z', 'N'],
 ['V', 'D'],
 ['N', 'C'],
 ['S']]
```

27T Gemini 2.5 Flash (no thinking)

Gemini

Threshold Row

55.0%

Mean Accuracy

20/12

Attempted Rows

24px

Smallest Letters

Configuration: thinking_budget: 0, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	N	V	C	?	Z	D	V	Z	C	2/5 (40%)
8	15px	V	D	S	?	?	N	V	D	N	S	0/5 (0%)
9	12px	K	C	Z	H	N	O	N	K	K	S	0/5 (0%)
10	10px	?	Z	S	N	D	V	C	V	D	C	0/5 (0%)
11	8px	C	H	?	V	?	O	H	S	R	H	1/5 (20%)
12	6px	R	?	S	?	?	C	D	Z	S	H	0/5 (0%)
13	0px	D	C	D	D	D	-	-	-	-	-	0/5 (0%)
14	0px	?	?	?	R	R	-	-	-	-	-	0/5 (0%)
15	0px	V	?	C	K	O	-	-	-	-	-	0/5 (0%)
16	0px	H	V	?	O	Z	-	-	-	-	-	0/5 (0%)
17	0px	?	?	O	O	?	-	-	-	-	-	0/5 (0%)
18	0px	C	?	D	C	D	-	-	-	-	-	0/5 (0%)
19	0px	S	V	S	H	V	-	-	-	-	-	0/5 (0%)
20	0px	C	Z	C	D	O	-	-	-	-	-	0/5 (0%)

Full Response:

Here are the letters identified row by row:

[['S', 'D', 'C', 'D', 'Z'],
 ['C', 'D', 'D', 'O', 'K'],
 ['C', 'C', 'C', 'O', 'Z'],
 ['S', 'Z', 'S', 'H', 'D'],
 ['H', 'D', 'C', 'V', 'S'],
 ['K', 'D', 'V', 'S', 'D'],
 ['Z', 'N', 'V', 'C', 'not sure'],
 ['V', 'D', 'S', 'not sure', 'not sure'],
 ['K', 'C', 'Z', 'H', 'N'],
 ['not sure', 'Z', 'S', 'N', 'D'],
 ['C', 'H', 'not sure', 'V', 'not sure'],
 ['R', 'not sure', 'S', 'not sure', 'not sure'],
 ['D', 'C', 'D', 'D', 'D'],
 ['not sure', 'not sure', 'not sure', 'R', 'R'],
 ['V', 'not sure', 'C', 'K', 'O'],
 ['H', 'V', 'not sure', 'O', 'Z'],
 ['not sure', 'not sure', 'O', 'O', 'not sure'],
 ['C', 'not sure', 'D', 'C', 'D'],
 ['S', 'V', 'S', 'H', 'V'],
 ['C', 'Z', 'C', 'D', 'O']]

28T Gemini 2.5 Pro (medium res)

Gemini

Threshold Row

55.0%

Mean Accuracy

12/12

Attempted Rows

24px

Smallest Letters

Configuration: media_resolution: MEDIUM, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	?	V	Z	?	Z	D	V	Z	C	3/5 (60%)
8	15px	?	?	?	?	?	N	V	D	N	S	0/5 (0%)
9	12px	?	?	?	?	?	O	N	K	K	S	0/5 (0%)
10	10px	?	?	?	?	?	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

```json
[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "not sure", "V", "Z", "not sure"],
  ["not sure", "not sure", "not sure", "not sure", "not sure"],
  ["not sure", "not sure", "not sure", "not sure", "not sure"],
  ["not sure", "not sure", "not sure", "not sure", "not sure"],
  ["not sure", "not sure", "not sure", "not sure", "not sure"],
  ["not sure", "not sure", "not sure", "not sure", "not sure"]
]
```

29 GPT-4O-MINI (high detail)

OpenAI

Threshold Row

51.7%

Mean Accuracy

14/12

Attempted Rows

24px

Smallest Letters

Configuration: image_detail: high, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	O	V	S	D	K	D	V	S	D	4/5 (80%)
7	19px	Z	R	Y	Z	?	Z	D	V	Z	C	2/5 (40%)
8	15px	?	?	?	?	?	N	V	D	N	S	0/5 (0%)
9	12px	?	?	?	?	?	O	N	K	K	S	0/5 (0%)
10	10px	?	?	?	?	?	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)
13	0px	?	?	?	?	?	-	-	-	-	-	0/5 (0%)
14	0px	?	?	?	?	?	-	-	-	-	-	0/5 (0%)

Full Response:

Here's the output representing the letters in the image, organized as a list of lists:

```plaintext
[
    ['S', 'D', 'C', 'D', 'Z'],
    ['C', 'D', 'D', 'O', 'K'],
    ['C', 'C', 'C', 'O', 'Z'],
    ['S', 'Z', 'S', 'H', 'D'],
    ['H', 'D', 'C', 'V', 'S'],
    ['K', 'O', 'V', 'S', 'D'],
    ['Z', 'R', 'Y', 'Z', 'not sure'],
    ['not sure', 'not sure', 'not sure', 'not sure', 'not sure'],
    ['not sure', 'not sure', 'not sure', 'not sure', 'not sure'],
    ['not sure', 'not sure', 'not sure', 'not sure', 'not sure'],
    ['not sure', 'not sure', 'not sure', 'not sure', 'not sure'],
    ['not sure', 'not sure', 'not sure', 'not sure', 'not sure'],
    ['not sure', 'not sure', 'not sure', 'not sure', 'not sure'],
    ['not sure', 'not sure', 'not sure', 'not sure', 'not sure'],
]
``` 

Note: The last rows contain "not sure" indicating uncertainty about the letters present.

30 GPT-4O-MINI (low detail)

OpenAI

Threshold Row

42.0%

Mean Accuracy

10/12

Attempted Rows

38px

Smallest Letters

Configuration: image_detail: low, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	O	Z	?	C	C	C	O	Z	2/5 (40%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	Y	?	H	D	C	V	S	3/5 (60%)
6	24px	*	D	C	Y	*	K	D	V	S	D	1/5 (20%)
7	19px	.	*	.	*	?	Z	D	V	Z	C	0/5 (0%)
8	15px	.	.	.	.	?	N	V	D	N	S	0/5 (0%)
9	12px	.	.	?	.	?	O	N	K	K	S	0/5 (0%)
10	10px	.	.	.	.	?	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

Here’s the output based on the image:

```plaintext
[
    ['S', 'D', 'C', 'D', 'Z'],
    ['C', 'D', 'D', 'O', 'K'],
    ['C', 'C', 'O', 'Z', 'not sure'],
    ['S', 'Z', 'S', 'H', 'D'],
    ['H', 'D', 'C', 'Y', 'not sure'],
    ['*', 'D', 'C', 'Y', '*'],
    ['.', '*', '.', '*'],
    ['.', '.', '.', '.'],
    ['.', '.', 'not sure', '.'],
    ['.', '.', '.', '.']
]
```

31 Grok 4 0709

xAI

Threshold Row

85.0%

Mean Accuracy

4/12

Attempted Rows

48px

Smallest Letters

Configuration: temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	O	O	Z	C	C	C	O	Z	4/5 (80%)
4	38px	S	Z	S	W	O	S	Z	S	H	D	3/5 (60%)
5	30px	?	?	?	?	?	H	D	C	V	S	0/5 (0%)
6	24px	?	?	?	?	?	K	D	V	S	D	0/5 (0%)
7	19px	?	?	?	?	?	Z	D	V	Z	C	0/5 (0%)
8	15px	?	?	?	?	?	N	V	D	N	S	0/5 (0%)
9	12px	?	?	?	?	?	O	N	K	K	S	0/5 (0%)
10	10px	?	?	?	?	?	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

[["S", "D", "C", "D", "Z"], ["C", "D", "D", "O", "K"], ["C", "C", "O", "O", "Z"], ["S", "Z", "S", "W", "O"]]

32T GPT-4O (low detail)

OpenAI

None

Threshold Row

0.0%

Mean Accuracy

0/12

Attempted Rows

N/A

Smallest Letters

Configuration: image_detail: low, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	?	?	?	?	?	S	D	C	D	Z	0/5 (0%)
2	60px	?	?	?	?	?	C	D	D	O	K	0/5 (0%)
3	48px	?	?	?	?	?	C	C	C	O	Z	0/5 (0%)
4	38px	?	?	?	?	?	S	Z	S	H	D	0/5 (0%)
5	30px	?	?	?	?	?	H	D	C	V	S	0/5 (0%)
6	24px	?	?	?	?	?	K	D	V	S	D	0/5 (0%)
7	19px	?	?	?	?	?	Z	D	V	Z	C	0/5 (0%)
8	15px	?	?	?	?	?	N	V	D	N	S	0/5 (0%)
9	12px	?	?	?	?	?	O	N	K	K	S	0/5 (0%)
10	10px	?	?	?	?	?	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

I'm unable to transcribe letters from this image format. Please provide a description or another format if possible.

33T Gemini 3 Flash Preview (high res)

Gemini

None

Threshold Row

0.0%

Mean Accuracy

0/12

Attempted Rows

N/A

Smallest Letters

Configuration: media_resolution: HIGH, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	?	?	?	?	?	S	D	C	D	Z	0/5 (0%)
2	60px	?	?	?	?	?	C	D	D	O	K	0/5 (0%)
3	48px	?	?	?	?	?	C	C	C	O	Z	0/5 (0%)
4	38px	?	?	?	?	?	S	Z	S	H	D	0/5 (0%)
5	30px	?	?	?	?	?	H	D	C	V	S	0/5 (0%)
6	24px	?	?	?	?	?	K	D	V	S	D	0/5 (0%)
7	19px	?	?	?	?	?	Z	D	V	Z	C	0/5 (0%)
8	15px	?	?	?	?	?	N	V	D	N	S	0/5 (0%)
9	12px	?	?	?	?	?	O	N	K	K	S	0/5 (0%)
10	10px	?	?	?	?	?	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

Based on the image provided, here are the letters row by row. Please note that as the letters get smaller in the lower rows, they become increasingly difficult to distinguish clearly.

*   **Row 1:** S, D, C, D, Z
*   **Row 2:** C, D, D, O, K
*   **Row 3:** C, C, C, O, Z
*   **Row 4:** S, Z, S, H, D
*   **Row 5:** H, D, C, V, S
*   **Row 6:** K, D, V, S, D
*   **Row 7:** Z, D, V, Z, C
*   **Row 8:** N, V, D, N, S
*   **Row 9:** O, N, K, K, S
*   **Row 10:** V, C, V, D, C
*   **Row 11:** O, H, S, K, H
*   **Row 12:** C, O, Z, K, H

Test Image (1K)

Click image to expand/collapse

Leaderboard (1K)

Rank	Model	Provider	Threshold Row	Threshold Size	Mean Accuracy	Attempted Rows
1T	Claude Haiku 4 5 20251001	Anthropic	12	6px	100.0%	12/12
2T	Claude Opus 4 5 20251101	Anthropic	12	6px	100.0%	12/12
3T	Claude Sonnet 4 20250514	Anthropic	12	6px	100.0%	12/12
4T	Claude Sonnet 4 5 20250929	Anthropic	12	6px	100.0%	12/12
5T	GPT-4.1-MINI	OpenAI	12	6px	100.0%	12/12
6T	GPT-4.1-MINI (high detail)	OpenAI	12	6px	100.0%	12/12
7T	GPT-4.1-MINI (low detail)	OpenAI	12	6px	100.0%	12/12
8T	GPT-5 (minimal)	OpenAI	12	6px	100.0%	12/12
9T	GPT-5-MINI (minimal)	OpenAI	12	6px	100.0%	12/12
10T	GPT-5.4 (original detail)	OpenAI	12	6px	100.0%	12/12
11T	Gemini 2.5 Flash (no thinking)	Gemini	12	6px	100.0%	12/12
12T	Gemini 2.5 Flash (no thinking) (medium res)	Gemini	12	6px	100.0%	12/12
13T	Gemini 2.5 Pro	Gemini	12	6px	100.0%	12/12
14T	Gemini 2.5 Pro (medium res)	Gemini	12	6px	100.0%	12/12
15T	Gemini 3 Flash Preview (low res)	Gemini	12	6px	100.0%	12/12
16T	Gemini 3 Flash Preview (medium res)	Gemini	12	6px	100.0%	12/12
17T	Gemini 3 Pro Preview (high res)	Gemini	12	6px	100.0%	12/12
18T	Gemini 3 Pro Preview (low res)	Gemini	12	6px	100.0%	12/12
19T	Gemini 3 Pro Preview (medium res)	Gemini	12	6px	100.0%	12/12
20T	Claude Opus 4 1 20250805	Anthropic	12	6px	98.3%	12/12
21T	Gemini 2.0 Flash (medium res)	Gemini	12	6px	98.3%	12/12
22	GPT-4.1	OpenAI	12	6px	95.0%	12/12
23	GPT-4O (high detail)	OpenAI	12	6px	68.3%	12/12
24	Gemini 2.0 Flash (high res)	Gemini	10	10px	100.0%	10/12
25	Grok 4 0709	xAI	9	12px	75.0%	12/12
26	Gemini 2.0 Flash (low res)	Gemini	2	60px	23.6%	11/12
27T	GPT-4.1-NANO (high detail)	OpenAI	1	76px	43.3%	12/12
28T	GPT-4.1-NANO (low detail)	OpenAI	1	76px	43.3%	12/12
29	Gemini 2.5 Pro (low res)	Gemini	1	76px	30.9%	11/12
30	GPT-4O-MINI (high detail)	OpenAI	1	76px	23.6%	11/12
31	GPT-4O-MINI (low detail)	OpenAI	1	76px	18.0%	10/12
32T	GPT-4O (low detail)	OpenAI	None	N/A	0.0%	0/12
33T	Gemini 3 Flash Preview (high res)	Gemini	None	N/A	0.0%	0/12

Click a row to see detailed results
Use ← → arrow keys to navigate between models when a card is open

1T Claude Haiku 4 5 20251001

Anthropic

Threshold Row

100.0%

Mean Accuracy

12/12

Attempted Rows

6px

Smallest Letters

Configuration: temperature: 1.0, max_tokens: 2000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	C	V	C	V	D	C	5/5 (100%)
11	8px	O	H	S	R	H	O	H	S	R	H	5/5 (100%)
12	6px	C	D	Z	S	H	C	D	Z	S	H	5/5 (100%)

Full Response:

# Row by Row Letter Analysis

Here's the list of lists representing the letters:

```
[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "D", "V", "Z", "C"],
  ["N", "V", "D", "N", "S"],
  ["O", "N", "K", "K", "S"],
  ["V", "C", "V", "D", "C"],
  ["O", "H", "S", "R", "H"],
  ["C", "D", "Z", "S", "H"]
]
```

All letters are clearly visible and identified with confidence. No "not sure" entries needed.

2T Claude Opus 4 5 20251101

Anthropic

Threshold Row

100.0%

Mean Accuracy

12/12

Attempted Rows

6px

Smallest Letters

Configuration: temperature: 1.0, max_tokens: 2000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	C	V	C	V	D	C	5/5 (100%)
11	8px	O	H	S	R	H	O	H	S	R	H	5/5 (100%)
12	6px	C	D	Z	S	H	C	D	Z	S	H	5/5 (100%)

Full Response:

I'll read the letters row by row from the image:

```
[
    ["S", "D", "C", "D", "Z"],
    ["C", "D", "D", "O", "K"],
    ["C", "C", "C", "O", "Z"],
    ["S", "Z", "S", "H", "D"],
    ["H", "D", "C", "V", "S"],
    ["K", "D", "V", "S", "D"],
    ["Z", "D", "V", "Z", "C"],
    ["N", "V", "D", "N", "S"],
    ["O", "N", "K", "K", "S"],
    ["V", "C", "V", "D", "C"],
    ["O", "H", "S", "R", "H"],
    ["C", "D", "Z", "S", "H"]
]
```

3T Claude Sonnet 4 20250514

Anthropic

Threshold Row

100.0%

Mean Accuracy

12/12

Attempted Rows

6px

Smallest Letters

Configuration: temperature: 1.0, max_tokens: 2000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	C	V	C	V	D	C	5/5 (100%)
11	8px	O	H	S	R	H	O	H	S	R	H	5/5 (100%)
12	6px	C	D	Z	S	H	C	D	Z	S	H	5/5 (100%)

Full Response:

Looking at the image row by row, here are the letters I can identify:

[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "D", "V", "Z", "C"],
  ["N", "V", "D", "N", "S"],
  ["O", "N", "K", "K", "S"],
  ["V", "C", "V", "D", "C"],
  ["O", "H", "S", "R", "H"],
  ["C", "D", "Z", "S", "H"]
]

4T Claude Sonnet 4 5 20250929

Anthropic

Threshold Row

100.0%

Mean Accuracy

12/12

Attempted Rows

6px

Smallest Letters

Configuration: temperature: 1.0, max_tokens: 2000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	C	V	C	V	D	C	5/5 (100%)
11	8px	O	H	S	R	H	O	H	S	R	H	5/5 (100%)
12	6px	C	D	Z	S	H	C	D	Z	S	H	5/5 (100%)

Full Response:

I'll read the letters row by row from the image:

```
[
  ['S', 'D', 'C', 'D', 'Z'],
  ['C', 'D', 'D', 'O', 'K'],
  ['C', 'C', 'C', 'O', 'Z'],
  ['S', 'Z', 'S', 'H', 'D'],
  ['H', 'D', 'C', 'V', 'S'],
  ['K', 'D', 'V', 'S', 'D'],
  ['Z', 'D', 'V', 'Z', 'C'],
  ['N', 'V', 'D', 'N', 'S'],
  ['O', 'N', 'K', 'K', 'S'],
  ['V', 'C', 'V', 'D', 'C'],
  ['O', 'H', 'S', 'R', 'H'],
  ['C', 'D', 'Z', 'S', 'H']
]
```

5T GPT-4.1-MINI

OpenAI

Threshold Row

100.0%

Mean Accuracy

12/12

Attempted Rows

6px

Smallest Letters

Configuration: image_detail: auto, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	C	V	C	V	D	C	5/5 (100%)
11	8px	O	H	S	R	H	O	H	S	R	H	5/5 (100%)
12	6px	C	D	Z	S	H	C	D	Z	S	H	5/5 (100%)

Full Response:

[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "D", "V", "Z", "C"],
  ["N", "V", "D", "N", "S"],
  ["O", "N", "K", "K", "S"],
  ["V", "C", "V", "D", "C"],
  ["O", "H", "S", "R", "H"],
  ["C", "D", "Z", "S", "H"]
]

6T GPT-4.1-MINI (high detail)

OpenAI

Threshold Row

100.0%

Mean Accuracy

12/12

Attempted Rows

6px

Smallest Letters

Configuration: image_detail: high, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	C	V	C	V	D	C	5/5 (100%)
11	8px	O	H	S	R	H	O	H	S	R	H	5/5 (100%)
12	6px	C	D	Z	S	H	C	D	Z	S	H	5/5 (100%)

Full Response:

[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "D", "V", "Z", "C"],
  ["N", "V", "D", "N", "S"],
  ["O", "N", "K", "K", "S"],
  ["V", "C", "V", "D", "C"],
  ["O", "H", "S", "R", "H"],
  ["C", "D", "Z", "S", "H"]
]

7T GPT-4.1-MINI (low detail)

OpenAI

Threshold Row

100.0%

Mean Accuracy

12/12

Attempted Rows

6px

Smallest Letters

Configuration: image_detail: low, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	C	V	C	V	D	C	5/5 (100%)
11	8px	O	H	S	R	H	O	H	S	R	H	5/5 (100%)
12	6px	C	D	Z	S	H	C	D	Z	S	H	5/5 (100%)

Full Response:

[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "D", "V", "Z", "C"],
  ["N", "V", "D", "N", "S"],
  ["O", "N", "K", "K", "S"],
  ["V", "C", "V", "D", "C"],
  ["O", "H", "S", "R", "H"],
  ["C", "D", "Z", "S", "H"]
]

8T GPT-5 (minimal)

OpenAI

Threshold Row

100.0%

Mean Accuracy

12/12

Attempted Rows

6px

Smallest Letters

Configuration: reasoning_effort: minimal, image_detail: auto, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	C	V	C	V	D	C	5/5 (100%)
11	8px	O	H	S	R	H	O	H	S	R	H	5/5 (100%)
12	6px	C	D	Z	S	H	C	D	Z	S	H	5/5 (100%)

Full Response:

[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "D", "V", "Z", "C"],
  ["N", "V", "D", "N", "S"],
  ["O", "N", "K", "K", "S"],
  ["V", "C", "V", "D", "C"],
  ["O", "H", "S", "R", "H"],
  ["C", "D", "Z", "S", "H"]
]

9T GPT-5-MINI (minimal)

OpenAI

Threshold Row

100.0%

Mean Accuracy

12/12

Attempted Rows

6px

Smallest Letters

Configuration: reasoning_effort: minimal, image_detail: auto, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	C	V	C	V	D	C	5/5 (100%)
11	8px	O	H	S	R	H	O	H	S	R	H	5/5 (100%)
12	6px	C	D	Z	S	H	C	D	Z	S	H	5/5 (100%)

Full Response:

[
["S", "D", "C", "D", "Z"],
["C", "D", "D", "O", "K"],
["C", "C", "C", "O", "Z"],
["S", "Z", "S", "H", "D"],
["H", "D", "C", "V", "S"],
["K", "D", "V", "S", "D"],
["Z", "D", "V", "Z", "C"],
["N", "V", "D", "N", "S"],
["O", "N", "K", "K", "S"],
["V", "C", "V", "D", "C"],
["O", "H", "S", "R", "H"],
["C", "D", "Z", "S", "H"]
]

10T GPT-5.4 (original detail)

OpenAI

Threshold Row

100.0%

Mean Accuracy

12/12

Attempted Rows

6px

Smallest Letters

Configuration: image_detail: original, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	C	V	C	V	D	C	5/5 (100%)
11	8px	O	H	S	R	H	O	H	S	R	H	5/5 (100%)
12	6px	C	D	Z	S	H	C	D	Z	S	H	5/5 (100%)

Full Response:

[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "D", "V", "Z", "C"],
  ["N", "V", "D", "N", "S"],
  ["O", "N", "K", "K", "S"],
  ["V", "C", "V", "D", "C"],
  ["O", "H", "S", "R", "H"],
  ["C", "D", "Z", "S", "H"]
]

11T Gemini 2.5 Flash (no thinking)

Gemini

Threshold Row

100.0%

Mean Accuracy

12/12

Attempted Rows

6px

Smallest Letters

Configuration: thinking_budget: 0, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	C	V	C	V	D	C	5/5 (100%)
11	8px	O	H	S	R	H	O	H	S	R	H	5/5 (100%)
12	6px	C	D	Z	S	H	C	D	Z	S	H	5/5 (100%)

Full Response:

Here are the letters read out row by row:

[['S', 'D', 'C', 'D', 'Z'],
 ['C', 'D', 'D', 'O', 'K'],
 ['C', 'C', 'C', 'O', 'Z'],
 ['S', 'Z', 'S', 'H', 'D'],
 ['H', 'D', 'C', 'V', 'S'],
 ['K', 'D', 'V', 'S', 'D'],
 ['Z', 'D', 'V', 'Z', 'C'],
 ['N', 'V', 'D', 'N', 'S'],
 ['O', 'N', 'K', 'K', 'S'],
 ['V', 'C', 'V', 'D', 'C'],
 ['O', 'H', 'S', 'R', 'H'],
 ['C', 'D', 'Z', 'S', 'H']]

12T Gemini 2.5 Flash (no thinking) (medium res)

Gemini

Threshold Row

100.0%

Mean Accuracy

12/12

Attempted Rows

6px

Smallest Letters

Configuration: thinking_budget: 0, media_resolution: MEDIUM, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	C	V	C	V	D	C	5/5 (100%)
11	8px	O	H	S	R	H	O	H	S	R	H	5/5 (100%)
12	6px	C	D	Z	S	H	C	D	Z	S	H	5/5 (100%)

Full Response:

Here are the letters, read row by row:

[['S', 'D', 'C', 'D', 'Z'],
 ['C', 'D', 'D', 'O', 'K'],
 ['C', 'C', 'C', 'O', 'Z'],
 ['S', 'Z', 'S', 'H', 'D'],
 ['H', 'D', 'C', 'V', 'S'],
 ['K', 'D', 'V', 'S', 'D'],
 ['Z', 'D', 'V', 'Z', 'C'],
 ['N', 'V', 'D', 'N', 'S'],
 ['O', 'N', 'K', 'K', 'S'],
 ['V', 'C', 'V', 'D', 'C'],
 ['O', 'H', 'S', 'R', 'H'],
 ['C', 'D', 'Z', 'S', 'H']]

13T Gemini 2.5 Pro

Gemini

Threshold Row

100.0%

Mean Accuracy

12/12

Attempted Rows

6px

Smallest Letters

Configuration: temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	C	V	C	V	D	C	5/5 (100%)
11	8px	O	H	S	R	H	O	H	S	R	H	5/5 (100%)
12	6px	C	D	Z	S	H	C	D	Z	S	H	5/5 (100%)

Full Response:

```json
[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "D", "V", "Z", "C"],
  ["N", "V", "D", "N", "S"],
  ["O", "N", "K", "K", "S"],
  ["V", "C", "V", "D", "C"],
  ["O", "H", "S", "R", "H"],
  ["C", "D", "Z", "S", "H"]
]
```

14T Gemini 2.5 Pro (medium res)

Gemini

Threshold Row

100.0%

Mean Accuracy

12/12

Attempted Rows

6px

Smallest Letters

Configuration: media_resolution: MEDIUM, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	C	V	C	V	D	C	5/5 (100%)
11	8px	O	H	S	R	H	O	H	S	R	H	5/5 (100%)
12	6px	C	D	Z	S	H	C	D	Z	S	H	5/5 (100%)

Full Response:

```json
[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "D", "V", "Z", "C"],
  ["N", "V", "D", "N", "S"],
  ["O", "N", "K", "K", "S"],
  ["V", "C", "V", "D", "C"],
  ["O", "H", "S", "R", "H"],
  ["C", "D", "Z", "S", "H"]
]
```

15T Gemini 3 Flash Preview (low res)

Gemini

Threshold Row

100.0%

Mean Accuracy

12/12

Attempted Rows

6px

Smallest Letters

Configuration: media_resolution: LOW, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	C	V	C	V	D	C	5/5 (100%)
11	8px	O	H	S	R	H	O	H	S	R	H	5/5 (100%)
12	6px	C	D	Z	S	H	C	D	Z	S	H	5/5 (100%)

Full Response:

Based on the image provided, here are the letters row by row:

1.  ['S', 'D', 'C', 'D', 'Z']
2.  ['C', 'D', 'D', 'O', 'K']
3.  ['C', 'C', 'C', 'O', 'Z']
4.  ['S', 'Z', 'S', 'H', 'D']
5.  ['H', 'D', 'C', 'V', 'S']
6.  ['K', 'D', 'V', 'S', 'D']
7.  ['Z', 'D', 'V', 'Z', 'C']
8.  ['N', 'V', 'D', 'N', 'S']
9.  ['O', 'N', 'K', 'K', 'S']
10. ['V', 'C', 'V', 'D', 'C']
11. ['O', 'H', 'S', 'R', 'H']
12. ['C', 'D', 'Z', 'S', 'H']

16T Gemini 3 Flash Preview (medium res)

Gemini

Threshold Row

100.0%

Mean Accuracy

12/12

Attempted Rows

6px

Smallest Letters

Configuration: media_resolution: MEDIUM, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	C	V	C	V	D	C	5/5 (100%)
11	8px	O	H	S	R	H	O	H	S	R	H	5/5 (100%)
12	6px	C	D	Z	S	H	C	D	Z	S	H	5/5 (100%)

Full Response:

Based on the image provided, here are the letters row by row:

1.  ['S', 'D', 'C', 'D', 'Z']
2.  ['C', 'D', 'D', 'O', 'K']
3.  ['C', 'C', 'C', 'O', 'Z']
4.  ['S', 'Z', 'S', 'H', 'D']
5.  ['H', 'D', 'C', 'V', 'S']
6.  ['K', 'D', 'V', 'S', 'D']
7.  ['Z', 'D', 'V', 'Z', 'C']
8.  ['N', 'V', 'D', 'N', 'S']
9.  ['O', 'N', 'K', 'K', 'S']
10. ['V', 'C', 'V', 'D', 'C']
11. ['O', 'H', 'S', 'R', 'H']
12. ['C', 'D', 'Z', 'S', 'H']

17T Gemini 3 Pro Preview (high res)

Gemini

Threshold Row

100.0%

Mean Accuracy

12/12

Attempted Rows

6px

Smallest Letters

Configuration: media_resolution: HIGH, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	C	V	C	V	D	C	5/5 (100%)
11	8px	O	H	S	R	H	O	H	S	R	H	5/5 (100%)
12	6px	C	D	Z	S	H	C	D	Z	S	H	5/5 (100%)

Full Response:

```json
[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "D", "V", "Z", "C"],
  ["N", "V", "D", "N", "S"],
  ["O", "N", "K", "K", "S"],
  ["V", "C", "V", "D", "C"],
  ["O", "H", "S", "R", "H"],
  ["C", "D", "Z", "S", "H"]
]
```

18T Gemini 3 Pro Preview (low res)

Gemini

Threshold Row

100.0%

Mean Accuracy

12/12

Attempted Rows

6px

Smallest Letters

Configuration: media_resolution: LOW, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	C	V	C	V	D	C	5/5 (100%)
11	8px	O	H	S	R	H	O	H	S	R	H	5/5 (100%)
12	6px	C	D	Z	S	H	C	D	Z	S	H	5/5 (100%)

Full Response:

Based on the image provided, here is the row-by-row transcription of the letters:

```json
[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "D", "V", "Z", "C"],
  ["N", "V", "D", "N", "S"],
  ["O", "N", "K", "K", "S"],
  ["V", "C", "V", "D", "C"],
  ["O", "H", "S", "R", "H"],
  ["C", "D", "Z", "S", "H"]
]
```

19T Gemini 3 Pro Preview (medium res)

Gemini

Threshold Row

100.0%

Mean Accuracy

12/12

Attempted Rows

6px

Smallest Letters

Configuration: media_resolution: MEDIUM, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	C	V	C	V	D	C	5/5 (100%)
11	8px	O	H	S	R	H	O	H	S	R	H	5/5 (100%)
12	6px	C	D	Z	S	H	C	D	Z	S	H	5/5 (100%)

Full Response:

Based on the image provided, here is the list of lists representing the letters in each row:

```json
[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "D", "V", "Z", "C"],
  ["N", "V", "D", "N", "S"],
  ["O", "N", "K", "K", "S"],
  ["V", "C", "V", "D", "C"],
  ["O", "H", "S", "R", "H"],
  ["C", "D", "Z", "S", "H"]
]
```

20T Claude Opus 4 1 20250805

Anthropic

Threshold Row

98.3%

Mean Accuracy

12/12

Attempted Rows

6px

Smallest Letters

Configuration: temperature: 1.0, max_tokens: 2000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	C	V	C	V	D	C	5/5 (100%)
11	8px	O	H	S	H	H	O	H	S	R	H	4/5 (80%)
12	6px	C	D	Z	S	H	C	D	Z	S	H	5/5 (100%)

Full Response:

Looking at the image row by row, I can identify the following letters:

```
[
  ["S", "D", "C", "D", "Z"],
  ["C", "D", "D", "O", "K"],
  ["C", "C", "C", "O", "Z"],
  ["S", "Z", "S", "H", "D"],
  ["H", "D", "C", "V", "S"],
  ["K", "D", "V", "S", "D"],
  ["Z", "D", "V", "Z", "C"],
  ["N", "V", "D", "N", "S"],
  ["O", "N", "K", "K", "S"],
  ["V", "C", "V", "D", "C"],
  ["O", "H", "S", "H", "H"],
  ["C", "D", "Z", "S", "H"]
]
```

21T Gemini 2.0 Flash (medium res)

Gemini

Threshold Row

98.3%

Mean Accuracy

12/12

Attempted Rows

6px

Smallest Letters

Configuration: media_resolution: MEDIUM, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	G	V	C	V	D	C	4/5 (80%)
11	8px	O	H	S	R	H	O	H	S	R	H	5/5 (100%)
12	6px	C	D	Z	S	H	C	D	Z	S	H	5/5 (100%)

Full Response:

Here's the letter data extracted from the image, row by row:

*   `['S', 'D', 'C', 'D', 'Z']`
*   `['C', 'D', 'D', 'O', 'K']`
*   `['C', 'C', 'C', 'O', 'Z']`
*   `['S', 'Z', 'S', 'H', 'D']`
*   `['H', 'D', 'C', 'V', 'S']`
*   `['K', 'D', 'V', 'S', 'D']`
*   `['Z', 'D', 'V', 'Z', 'C']`
*   `['N', 'V', 'D', 'N', 'S']`
*   `['O', 'N', 'K', 'K', 'S']`
*   `['V', 'C', 'V', 'D', 'G']`
*   `['O', 'H', 'S', 'R', 'H']`
*   `['C', 'D', 'Z', 'S', 'H']`

22 GPT-4.1

OpenAI

Threshold Row

95.0%

Mean Accuracy

12/12

Attempted Rows

6px

Smallest Letters

Configuration: image_detail: auto, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	z	D	V	z	C	Z	D	V	Z	C	3/5 (60%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	v	C	V	D	C	V	C	V	D	C	4/5 (80%)
11	8px	O	H	S	R	H	O	H	S	R	H	5/5 (100%)
12	6px	C	D	Z	S	H	C	D	Z	S	H	5/5 (100%)

Full Response:

Here are the letters from the image, row by row, represented as a list of lists. For any letter I am not sure of, I have marked it as "not sure":

```python
[
    ['S', 'D', 'C', 'D', 'Z'],
    ['C', 'D', 'D', 'O', 'K'],
    ['C', 'C', 'C', 'O', 'Z'],
    ['S', 'Z', 'S', 'H', 'D'],
    ['H', 'D', 'C', 'V', 'S'],
    ['K', 'D', 'V', 'S', 'D'],
    ['z', 'D', 'V', 'z', 'C'],
    ['N', 'V', 'D', 'N', 'S'],
    ['O', 'N', 'K', 'K', 'S'],
    ['v', 'C', 'V', 'D', 'C'],
    ['O', 'H', 'S', 'R', 'H'],
    ['C', 'D', 'Z', 'S', 'H']
]
```

Let me know if you need the output in a different format or more details!

23 GPT-4O (high detail)

OpenAI

Threshold Row

68.3%

Mean Accuracy

12/12

Attempted Rows

6px

Smallest Letters

Configuration: image_detail: high, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	O	C	K	C	D	D	O	K	3/5 (60%)
3	48px	C	C	O	Z	?	C	C	C	O	Z	2/5 (40%)
4	38px	S	Z	H	D	S	S	Z	S	H	D	2/5 (40%)
5	30px	H	D	V	S	D	H	D	C	V	S	2/5 (40%)
6	24px	K	D	V	Z	C	K	D	V	S	D	3/5 (60%)
7	19px	Z	V	D	N	S	Z	D	V	Z	C	1/5 (20%)
8	15px	N	V	D	S	?	N	V	D	N	S	3/5 (60%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	C	V	C	V	D	C	5/5 (100%)
11	8px	O	H	S	R	H	O	H	S	R	H	5/5 (100%)
12	6px	C	D	Z	S	H	C	D	Z	S	H	5/5 (100%)

Full Response:

```python
[
    ['S', 'D', 'C', 'D', 'Z'],
    ['C', 'D', 'O', 'C', 'K'],
    ['C', 'C', 'O', 'Z'],
    ['S', 'Z', 'H', 'D', 'S'],
    ['H', 'D', 'V', 'S', 'D'],
    ['K', 'D', 'V', 'Z', 'C'],
    ['Z', 'V', 'D', 'N', 'S'],
    ['N', 'V', 'D', 'S'],
    ['O', 'N', 'K', 'K', 'S'],
    ['V', 'C', 'V', 'D', 'C'],
    ['O', 'H', 'S', 'R', 'H'],
    ['C', 'D', 'Z', 'S', 'H']
]
```

24 Gemini 2.0 Flash (high res)

Gemini

Threshold Row

100.0%

Mean Accuracy

10/12

Attempted Rows

10px

Smallest Letters

Configuration: media_resolution: HIGH, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	V	C	V	D	C	V	C	V	D	C	5/5 (100%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

Here's the list of lists representing the letters in the image, row by row:

```
[['S', 'D', 'C', 'D', 'Z'],
['C', 'D', 'D', 'O', 'K'],
['C', 'C', 'C', 'O', 'Z'],
['S', 'Z', 'S', 'H', 'D'],
['H', 'D', 'C', 'V', 'S'],
['K', 'D', 'V', 'S', 'D'],
['Z', 'D', 'V', 'Z', 'C'],
['N', 'V', 'D', 'N', 'S'],
['O', 'N', 'K', 'K', 'S'],
['V', 'C', 'V', 'D', 'C']]
```

25 Grok 4 0709

xAI

Threshold Row

75.0%

Mean Accuracy

12/12

Attempted Rows

12px

Smallest Letters

Configuration: temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	D	D	O	K	C	D	D	O	K	5/5 (100%)
3	48px	C	C	C	O	Z	C	C	C	O	Z	5/5 (100%)
4	38px	S	Z	S	H	D	S	Z	S	H	D	5/5 (100%)
5	30px	H	D	C	V	S	H	D	C	V	S	5/5 (100%)
6	24px	K	D	V	S	D	K	D	V	S	D	5/5 (100%)
7	19px	Z	D	V	Z	C	Z	D	V	Z	C	5/5 (100%)
8	15px	N	V	D	N	S	N	V	D	N	S	5/5 (100%)
9	12px	O	N	K	K	S	O	N	K	K	S	5/5 (100%)
10	10px	C	V	D	C	?	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

[["S", "D", "C", "D", "Z"],
["C", "D", "D", "O", "K"],
["C", "C", "C", "O", "Z"],
["S", "Z", "S", "H", "D"],
["H", "D", "C", "V", "S"],
["K", "D", "V", "S", "D"],
["Z", "D", "V", "Z", "C"],
["N", "V", "D", "N", "S"],
["O", "N", "K", "K", "S"],
["C", "V", "D", "C", "not sure"],
["not sure", "not sure", "not sure", "not sure", "not sure"],
["not sure", "not sure", "not sure", "not sure", "not sure"]]

26 Gemini 2.0 Flash (low res)

Gemini

Threshold Row

23.6%

Mean Accuracy

11/12

Attempted Rows

60px

Smallest Letters

Configuration: media_resolution: LOW, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	C	D	O	K	C	D	D	O	K	4/5 (80%)
3	48px	S	Z	S	H	D	C	C	C	O	Z	0/5 (0%)
4	38px	H	D	C	V	S	S	Z	S	H	D	0/5 (0%)
5	30px	K	D	V	S	D	H	D	C	V	S	1/5 (20%)
6	24px	Z	D	V	Z	C	K	D	V	S	D	2/5 (40%)
7	19px	N	V	D	N	S	Z	D	V	Z	C	0/5 (0%)
8	15px	O	N	K	K	S	N	V	D	N	S	1/5 (20%)
9	12px	V	C	V	D	C	O	N	K	K	S	0/5 (0%)
10	10px	O	H	S	R	H	V	C	V	D	C	0/5 (0%)
11	8px	C	D	Z	S	C	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

Here's the OCR output in the format you requested:

```
[
  ['S', 'D', 'C', 'D', 'Z'],
  ['C', 'C', 'D', 'O', 'K'],
  ['S', 'Z', 'S', 'H', 'D'],
  ['H', 'D', 'C', 'V', 'S'],
  ['K', 'D', 'V', 'S', 'D'],
  ['Z', 'D', 'V', 'Z', 'C'],
  ['N', 'V', 'D', 'N', 'S'],
  ['O', 'N', 'K', 'K', 'S'],
  ['V', 'C', 'V', 'D', 'C'],
  ['O', 'H', 'S', 'R', 'H'],
  ['C', 'D', 'Z', 'S', 'C']
]
```

27T GPT-4.1-NANO (high detail)

OpenAI

Threshold Row

43.3%

Mean Accuracy

12/12

Attempted Rows

76px

Smallest Letters

Configuration: image_detail: high, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	s	D	C	D	Z	S	D	C	D	Z	4/5 (80%)
2	60px	c	D	D	o	K	C	D	D	O	K	3/5 (60%)
3	48px	c	c	c	o	z	C	C	C	O	Z	0/5 (0%)
4	38px	s	z	s	H	D	S	Z	S	H	D	2/5 (40%)
5	30px	H	D	c	v	s	H	D	C	V	S	2/5 (40%)
6	24px	K	D	v	s	D	K	D	V	S	D	3/5 (60%)
7	19px	z	D	v	z	c	Z	D	V	Z	C	1/5 (20%)
8	15px	N	v	D	N	s	N	V	D	N	S	3/5 (60%)
9	12px	o	N	k	K	s	O	N	K	K	S	2/5 (40%)
10	10px	v	c	v	D	c	V	C	V	D	C	1/5 (20%)
11	8px	o	H	s	R	H	O	H	S	R	H	3/5 (60%)
12	6px	c	D	z	s	H	C	D	Z	S	H	2/5 (40%)

Full Response:

[
  ['s', 'D', 'C', 'D', 'Z'],
  ['c', 'D', 'D', 'o', 'K'],
  ['c', 'c', 'c', 'o', 'z'],
  ['s', 'z', 's', 'H', 'D'],
  ['H', 'D', 'c', 'v', 's'],
  ['K', 'D', 'v', 's', 'D'],
  ['z', 'D', 'v', 'z', 'c'],
  ['N', 'v', 'D', 'N', 's'],
  ['o', 'N', 'k', 'K', 's'],
  ['v', 'c', 'v', 'D', 'c'],
  ['o', 'H', 's', 'R', 'H'],
  ['c', 'D', 'z', 's', 'H']
]

28T GPT-4.1-NANO (low detail)

OpenAI

Threshold Row

43.3%

Mean Accuracy

12/12

Attempted Rows

76px

Smallest Letters

Configuration: image_detail: low, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	s	D	C	D	Z	S	D	C	D	Z	4/5 (80%)
2	60px	c	D	D	o	K	C	D	D	O	K	3/5 (60%)
3	48px	c	c	c	o	z	C	C	C	O	Z	0/5 (0%)
4	38px	s	z	s	H	D	S	Z	S	H	D	2/5 (40%)
5	30px	H	D	c	v	s	H	D	C	V	S	2/5 (40%)
6	24px	K	D	v	s	D	K	D	V	S	D	3/5 (60%)
7	19px	z	D	v	z	c	Z	D	V	Z	C	1/5 (20%)
8	15px	N	v	D	N	s	N	V	D	N	S	3/5 (60%)
9	12px	o	N	k	K	s	O	N	K	K	S	2/5 (40%)
10	10px	v	c	v	D	c	V	C	V	D	C	1/5 (20%)
11	8px	o	H	s	R	H	O	H	S	R	H	3/5 (60%)
12	6px	c	D	z	s	H	C	D	Z	S	H	2/5 (40%)

Full Response:

[
  ['s', 'D', 'C', 'D', 'Z'],
  ['c', 'D', 'D', 'o', 'K'],
  ['c', 'c', 'c', 'o', 'z'],
  ['s', 'z', 's', 'H', 'D'],
  ['H', 'D', 'c', 'v', 's'],
  ['K', 'D', 'v', 's', 'D'],
  ['z', 'D', 'v', 'z', 'c'],
  ['N', 'v', 'D', 'N', 's'],
  ['o', 'N', 'k', 'K', 's'],
  ['v', 'c', 'v', 'D', 'c'],
  ['o', 'H', 's', 'R', 'H'],
  ['c', 'D', 'z', 's', 'H']
]

29 Gemini 2.5 Pro (low res)

Gemini

Threshold Row

30.9%

Mean Accuracy

11/12

Attempted Rows

76px

Smallest Letters

Configuration: media_resolution: LOW, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	C	O	O	K	C	D	D	O	K	3/5 (60%)
3	48px	S	Z	C	H	S	C	C	C	O	Z	1/5 (20%)
4	38px	H	D	C	V	D	S	Z	S	H	D	1/5 (20%)
5	30px	K	D	V	S	D	H	D	C	V	S	1/5 (20%)
6	24px	Z	D	V	Z	C	K	D	V	S	D	2/5 (40%)
7	19px	N	V	D	N	S	Z	D	V	Z	C	0/5 (0%)
8	15px	O	N	K	K	S	N	V	D	N	S	1/5 (20%)
9	12px	V	C	S	R	H	O	N	K	K	S	0/5 (0%)
10	10px	O	H	V	D	?	V	C	V	D	C	2/5 (40%)
11	8px	C	D	Z	S	H	O	H	S	R	H	1/5 (20%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

```json
[
  ["S", "D", "C", "D", "Z"],
  ["C", "C", "O", "O", "K"],
  ["S", "Z", "C", "H", "S"],
  ["H", "D", "C", "V", "D"],
  ["K", "D", "V", "S", "D"],
  ["Z", "D", "V", "Z", "C"],
  ["N", "V", "D", "N", "S"],
  ["O", "N", "K", "K", "S"],
  ["V", "C", "S", "R", "H"],
  ["O", "H", "V", "D", "not sure"],
  ["C", "D", "Z", "S", "H"]
]
```

30 GPT-4O-MINI (high detail)

OpenAI

Threshold Row

23.6%

Mean Accuracy

11/12

Attempted Rows

76px

Smallest Letters

Configuration: image_detail: high, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	C	C	O	K	C	D	D	O	K	3/5 (60%)
3	48px	S	Z	S	H	D	C	C	C	O	Z	0/5 (0%)
4	38px	H	D	C	V	S	S	Z	S	H	D	0/5 (0%)
5	30px	K	D	V	S	D	H	D	C	V	S	1/5 (20%)
6	24px	z	D	V	z	C	K	D	V	S	D	2/5 (40%)
7	19px	N	V	D	N	S	Z	D	V	Z	C	0/5 (0%)
8	15px	O	N	K	K	S	N	V	D	N	S	1/5 (20%)
9	12px	V	C	V	D	C	O	N	K	K	S	0/5 (0%)
10	10px	O	H	S	R	H	V	C	V	D	C	0/5 (0%)
11	8px	C	D	Z	S	H	O	H	S	R	H	1/5 (20%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

Here is a list of letters organized row by row as observed in the image:

```plaintext
[
  ['S', 'D', 'C', 'D', 'Z'],
  ['C', 'C', 'C', 'O', 'K'],
  ['S', 'Z', 'S', 'H', 'D'],
  ['H', 'D', 'C', 'V', 'S'],
  ['K', 'D', 'V', 'S', 'D'],
  ['z', 'D', 'V', 'z', 'C'],
  ['N', 'V', 'D', 'N', 'S'],
  ['O', 'N', 'K', 'K', 'S'],
  ['V', 'C', 'V', 'D', 'C'],
  ['O', 'H', 'S', 'R', 'H'],
  ['C', 'D', 'Z', 'S', 'H']
]
```

31 GPT-4O-MINI (low detail)

OpenAI

Threshold Row

18.0%

Mean Accuracy

10/12

Attempted Rows

76px

Smallest Letters

Configuration: image_detail: low, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	S	D	C	D	Z	S	D	C	D	Z	5/5 (100%)
2	60px	C	C	C	O	Z	C	D	D	O	K	2/5 (40%)
3	48px	S	Z	S	H	D	C	C	C	O	Z	0/5 (0%)
4	38px	K	D	V	S	D	S	Z	S	H	D	1/5 (20%)
5	30px	Z	D	V	Z	C	H	D	C	V	S	1/5 (20%)
6	24px	N	V	D	N	S	K	D	V	S	D	0/5 (0%)
7	19px	O	N	K	K	S	Z	D	V	Z	C	0/5 (0%)
8	15px	V	O	V	D	C	N	V	D	N	S	0/5 (0%)
9	12px	?	S	?	?	?	O	N	K	K	S	0/5 (0%)
10	10px	C	D	Z	S	?	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

Here's the representation of the letters from the image, row by row:

```plaintext
[
    ['S', 'D', 'C', 'D', 'Z'],
    ['C', 'C', 'C', 'O', 'Z'],
    ['S', 'Z', 'S', 'H', 'D'],
    ['K', 'D', 'V', 'S', 'D'],
    ['Z', 'D', 'V', 'Z', 'C'],
    ['N', 'V', 'D', 'N', 'S'],
    ['O', 'N', 'K', 'K', 'S'],
    ['V', 'O', 'V', 'D', 'C'],
    ['not sure', 'S', 'not sure', 'not sure', 'not sure'],
    ['C', 'D', 'Z', 'S', 'not sure']
]
```

32T GPT-4O (low detail)

OpenAI

None

Threshold Row

0.0%

Mean Accuracy

0/12

Attempted Rows

N/A

Smallest Letters

Configuration: image_detail: low, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	?	?	?	?	?	S	D	C	D	Z	0/5 (0%)
2	60px	?	?	?	?	?	C	D	D	O	K	0/5 (0%)
3	48px	?	?	?	?	?	C	C	C	O	Z	0/5 (0%)
4	38px	?	?	?	?	?	S	Z	S	H	D	0/5 (0%)
5	30px	?	?	?	?	?	H	D	C	V	S	0/5 (0%)
6	24px	?	?	?	?	?	K	D	V	S	D	0/5 (0%)
7	19px	?	?	?	?	?	Z	D	V	Z	C	0/5 (0%)
8	15px	?	?	?	?	?	N	V	D	N	S	0/5 (0%)
9	12px	?	?	?	?	?	O	N	K	K	S	0/5 (0%)
10	10px	?	?	?	?	?	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

I'm unable to view the image directly, but I can help with analyzing it if you can provide a description or transcribe the visible letters for me. Let me know how you'd like to proceed!

33T Gemini 3 Flash Preview (high res)

Gemini

None

Threshold Row

0.0%

Mean Accuracy

0/12

Attempted Rows

N/A

Smallest Letters

Configuration: media_resolution: HIGH, temperature: 1.0, max_tokens: 20000

Row	Size	Predicted					Ground Truth					Accuracy
1	76px	?	?	?	?	?	S	D	C	D	Z	0/5 (0%)
2	60px	?	?	?	?	?	C	D	D	O	K	0/5 (0%)
3	48px	?	?	?	?	?	C	C	C	O	Z	0/5 (0%)
4	38px	?	?	?	?	?	S	Z	S	H	D	0/5 (0%)
5	30px	?	?	?	?	?	H	D	C	V	S	0/5 (0%)
6	24px	?	?	?	?	?	K	D	V	S	D	0/5 (0%)
7	19px	?	?	?	?	?	Z	D	V	Z	C	0/5 (0%)
8	15px	?	?	?	?	?	N	V	D	N	S	0/5 (0%)
9	12px	?	?	?	?	?	O	N	K	K	S	0/5 (0%)
10	10px	?	?	?	?	?	V	C	V	D	C	0/5 (0%)
11	8px	?	?	?	?	?	O	H	S	R	H	0/5 (0%)
12	6px	?	?	?	?	?	C	D	Z	S	H	0/5 (0%)

Full Response:

Based on the image provided, here are the letters row by row:

Row 1: S, D, C, D, Z
Row 2: C, D, D, O, K
Row 3: C, C, C, O, Z
Row 4: S, Z, S, H, D
Row 5: H, D, C, V, S
Row 6: K, D, V, S, D
Row 7: Z, D, V, Z, C
Row 8: N, V, D, N, S
Row 9: O, N, K, K, S
Row 10: V, C, V, D, C
Row 11: O, H, S, R, H
Row 12: C, D, Z, S, H