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Best AI models, ranked

Which AI model codes best, and what it costs.

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27
Ranked: 2
Not ranked: 29 Sept 2026
Updated

01
Claude Opus 5.5
claude-opus-5-5Anthropic
Index score82
x
02
Gemini 4 Argon
gemini-4-argonGoogle DeepMind
Index score81
x
03
Claude Sonnet 5.5
claude-sonnet-5-5Anthropic
Index score78
x

01Claude Opus 5.5claude-opus-5-582
x
02—Gemini 4 Argongemini-4-argon81
x
03—Claude Sonnet 5.5claude-sonnet-5-578
x
04—GPT-6.1 Solgpt-6-1-sol73
x
05Claude Fable 5.1claude-fable-5-168
x
063Muse Spark 1.3muse-spark-1.368
x
075Gemini 3.8 Flashgemini-3.8-flash68
x
084GPT-6 Astragpt-6-astra68
x
093Grok 4.7grok-4.763
x
103Claude Opus 5claude-opus-562
x
112Claude Fable 5claude-fable-558
x
122GPT-5.6 Solgpt-5.6-sol56
x
135GPT-6 Solgpt-6-sol56
x
143Grok 4.6grok-4.653
x
153Gemini 3.7 Flashgemini-3.7-flash48
x
161Muse Spark 1.2muse-spark-1.243
x
173GPT-5.6 Terragpt-5.6-terra42
x
182GPT-5.6 Lunagpt-5.6-luna42
x
196Claude Opus 4.8claude-opus-4-841
x
203GPT-6 Lunagpt-6-luna39
x
213Gemini 3.6 Flashgemini-3.6-flash35
x
222Claude Sonnet 5claude-sonnet-531
x
234Claude Opus 4.7claude-opus-4-730
x
243GPT-5.5gpt-5.527
x
253Gemini 3.1 Progemini-3.1-pro-preview25
x
263Gemini 3.5 Flashgemini-3.5-flash24
x
273Claude Sonnet 4.6claude-sonnet-4-614
x

Rank	Move
01		Claude Opus 5.5claude-opus-5-5Anthropic	top 8%	top 4%	top 4%	4 / 20	82 x
02	—	Gemini 4 Argongemini-4-argonGoogle DeepMind	top 8%	top 16%	top 28%	2 / 10	81 x
03	—	Claude Sonnet 5.5claude-sonnet-5-5Anthropic	top 14%	top 23%	top 6%	2 / 10	78 x
04	—	GPT-6.1 Solgpt-6-1-solOpenAI	top 16%	top 26%	top 43%	2 / 10	73 x
05		Claude Fable 5.1claude-fable-5-1Anthropic	top 22%	top 8%	top 9%	10 / 50	68 x
06	3	Muse Spark 1.3muse-spark-1.3Meta	top 26%	bottom 46%	top 20%	1.25 / 4.25	68 x
07	5	Gemini 3.8 Flashgemini-3.8-flashGoogle DeepMind	top 31%	top 34%	bottom 31%	0.75 / 3.75	68 x
08	4	GPT-6 Astragpt-6-astraOpenAI	top 12%	top 16%	top 39%	10 / 50	68 x
09	3	Grok 4.7grok-4.7SpaceXAI (xAI)	top 34%	bottom 49%	top 17%	2 / 6	63 x
10	3	Claude Opus 5claude-opus-5Anthropic	top 30%	top 28%	top 13%	5 / 25	62 x
11	2	Claude Fable 5claude-fable-5Anthropic	top 38%	top 12%	top 31%	10 / 50	58 x
12	2	GPT-5.6 Solgpt-5.6-solOpenAI	top 33%	top 44%	top 35%	4 / 20	56 x
13	5	GPT-6 Solgpt-6-solOpenAI	top 38%	bottom 47%	top 46%	2 / 10	56 x
14	3	Grok 4.6grok-4.6SpaceXAI (xAI)	bottom 46%	bottom 48%	top 24%	2 / 6	53 x
15	3	Gemini 3.7 Flashgemini-3.7-flashGoogle DeepMind	bottom 38%	bottom 44%	bottom 28%	0.75 / 3.75	48 x
16	1	Muse Spark 1.2muse-spark-1.2Meta	bottom 24%	bottom 46%	top 50%	1.25 / 4.25	43 x
17	3	GPT-5.6 Terragpt-5.6-terraOpenAI	top 44%	bottom 17%	bottom 35%	2 / 12	42 x
18	2	GPT-5.6 Lunagpt-5.6-lunaOpenAI	bottom 38%	bottom 6%	bottom 43%	0.20 / 1.2	42 x
19	6	Claude Opus 4.8claude-opus-4-8Anthropic	bottom 42%	top 41%	bottom 39%	5 / 25	41 x
20	3	GPT-6 Lunagpt-6-lunaOpenAI	bottom 33%	bottom 8%	bottom 24%	0.10 / 0.50	39 x
21	3	Gemini 3.6 Flashgemini-3.6-flashGoogle DeepMind	bottom 17%	bottom 34%	bottom 13%	0.75 / 3.75	35 x
22	2	Claude Sonnet 5claude-sonnet-5Anthropic	bottom 26%	bottom 18%	bottom 46%	2 / 10	31 x
23	4	Claude Opus 4.7claude-opus-4-7Anthropic	bottom 28%	bottom 47%	bottom 20%	5 / 25	30 x
24	3	GPT-5.5gpt-5.5OpenAI	bottom 39%	bottom 20%	bottom 17%	5 / 30	27 x
25	3	Gemini 3.1 Progemini-3.1-pro-previewGoogle DeepMind	bottom 6%	top 48%	bottom 4%	2 / 12	25 x
26	3	Gemini 3.5 Flashgemini-3.5-flashGoogle DeepMind	bottom 11%	bottom 19%	bottom 6%	1.5 / 9	24 x
27	3	Claude Sonnet 4.6claude-sonnet-4-6Anthropic	bottom 8%	bottom 8%	bottom 9%	3 / 15	14 x

Each column is one thing we measure. “Top 10%” means better than 90% of the board.

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Flagship

Claude Mythos 5claude-mythos-5Anthropic8 features
Claude Mythos 5.1claude-mythos-5-1Anthropic7 features