Model intelligence

55 AI models

Capability (Epoch Capabilities Index and individual benchmarks from Epoch AI), API list prices and context windows (OpenRouter), release dates and open-weight status. Benchmarks are shown individually - never merged into one invented score.

Leads on ECI

GPT-6 Astra

ECI 166.6Epoch AI

Leads on GPQA Diamond

GPT-6 Astra

95.8%Epoch AI

Leads on SWE-bench Verified

Claude Opus 4.7

83.5%Epoch AI

Cheapest in ECI top 10

GPT-5.6 Sol

$2.00/M inputOpenRouter

Longest context

Grok 4.20 Multi-Agent

2M tokensOpenRouter

Best open-weight on ECI

Kimi K3

ECI 157.68Epoch AI

Epoch Capabilities Index by release date

Capability frontier

About ECI ↗

Source: Epoch AI (CC BY 4.0). ECI is Epoch's item-response model over many benchmarks; each model page shows its 90% confidence interval.

Blended $/1M tokens (3:1 input:output) vs ECI

Price vs capability

Only models with both an ECI score and an OpenRouter price. Normalisation: 75% input + 25% output price. Click a point to open the model.

55 models

3 filters:

#	Model	ECI ↓	AA idx	GPQA◆	SWE-v	FrontierMath	AIME	HLE	Terminal	Context	In $/M	Out $/M	Weights	Released
1	GPT-6 Astra OpenAI· reasoning	166.6	52.7	95.8	—	93.7	100.0	—	—	1.05M	$10.0	$50.0	Closed	3 Sep 2026
2	Claude Fable 5.1 Anthropic· reasoning	165.0	53.4	—	—	90.2	100.0	—	—	1M	$10.0	$50.0	Closed	1 Sep 2026
3	Claude Fable 5 Anthropic· reasoning	163.6	49.6	85.9	—	87.0	100.0	—	—	1M	$10.0	$50.0	Closed	9 Jun 2026
4	Claude Opus 5 Anthropic· reasoning	162.7	50.8	93.9	—	85.6	98.9	—	—	1M	$5.00	$25.0	Closed	24 Jul 2026
5	GPT-5.5 Pro OpenAI· reasoning	162.4	—	—	—	—	—	—	—	1.05M	$30.0	$180.0	Closed	23 Apr 2026
6	GPT-5.6 Sol OpenAI· reasoning	162.0	47.0	93.5	—	89.1	100.0	—	—	1.05M	$2.00	$10.0	Closed	9 Jul 2026
7	GPT-5.6 Terra OpenAI· reasoning	159.3	42.1	93.3	—	86.0	99.7	—	—	1.05M	$2.00	$12.0	Closed	9 Jul 2026
8	GPT-5.5 OpenAI· reasoning	159.3	38.4	—	—	—	—	—	—	1.05M	$5.00	$30.0	Closed	23 Apr 2026
9	GPT-5.4 Pro OpenAI· reasoning	159.1	—	—	—	—	—	44.3	—	1.05M	$30.0	$180.0	Closed	5 Mar 2026
10	Claude Opus 4.8 Anthropic· reasoning	158.3	41.8	91.0	—	80.0	98.3	—	—	1M	$5.00	$25.0	Closed	28 May 2026
11	Gemini 3.7 Flash Google· reasoning	157.7	39.1	94.8	—	71.6	97.2	—	—	1.05M	$0.75	$3.75	Closed	13 Aug 2026
12	Gemini 3.8 Flash Google· reasoning	157.1	40.9	95.4	—	68.4	98.9	—	—	1.05M	$0.75	$3.75	Closed	2 Sep 2026
13	GPT-5.4 OpenAI· reasoning	156.9	—	89.9	76.9	—	97.8	—	—	1.05M	$2.50	$15.0	Closed	5 Mar 2026
14	Muse Spark 1.3 Meta· reasoning	156.9	—	—	—	74.0	—	—	—	1.05M	$1.25	$4.25	Closed	2 Sep 2026
15	GPT-5.3-Codex OpenAI· reasoning	156.8	—	—	74.8	—	—	—	78.4	400K	$1.75	$14.0	Closed	5 Feb 2026
16	Grok 4.6 xAI· reasoning	156.5	44.3	94.0	—	—	97.8	—	—	500K	$2.00	$6.00	Closed	12 Aug 2026
17	Claude Opus 4.7 Anthropic· reasoning	156.4	—	86.4	83.5	70.2	86.7	—	—	1M	$5.00	$25.0	Closed	16 Apr 2026
18	Claude Sonnet 5 Anthropic· reasoning	156.3	38.2	80.3	—	65.6	80.0	—	—	1M	$2.00	$10.0	Closed	30 Jun 2026
19	GPT-5.6 Luna OpenAI· reasoning	156.3	37.3	91.6	—	82.1	98.3	—	—	1.05M	$0.20	$1.20	Closed	9 Jul 2026
20	GPT-5.2 Pro OpenAI· reasoning	155.4	—	—	—	74.0	—	—	—	400K	$21.0	$168.0	Closed	11 Dec 2025
21	Claude Opus 4.6 Anthropic· reasoning	155.4	—	88.4	—	66.0	91.1	34.4	—	1M	$5.00	$25.0	Closed	5 Feb 2026
22	Qwen3.8 Max (0902) Alibaba (Qwen)· reasoning	155.3	45.4	—	—	—	—	—	—	1M	$2.00	$6.00	Closed	1 Sep 2026
23	Muse Spark 1.2 Meta· reasoning	155.2	39.6	—	—	—	—	—	—	1.05M	$1.25	$4.25	Closed	5 Aug 2026
24	Gemini 3.5 Flash Google· reasoning	154.6	32.6	92.8	79.3	62.8	95.6	—	—	1.05M	$1.50	$9.00	Closed	19 May 2026
25	Gemini 3.6 Flash Google· reasoning	154.4	34.0	94.1	—	58.9	94.2	—	—	1.05M	$0.75	$3.75	Closed	21 Jul 2026
26	Muse Spark 1.1 Meta· reasoning	154.3	33.7	—	—	—	—	—	—	1.05M	$1.25	$4.25	Closed	9 Jul 2026
27	Grok 4.5 xAI· reasoning	154.0	38.8	93.4	—	57.2	97.8	—	—	500K	$2.00	$6.00	Closed	8 Jul 2026
28	GPT-5.2 OpenAI· reasoning	153.4	—	88.2	73.8	—	96.1	—	—	400K	$1.75	$14.0	Closed	11 Dec 2025
29	Claude Sonnet 4.6 Anthropic· reasoning	152.3	30.1	83.3	—	—	75.6	—	—	1M	$3.00	$15.0	Closed	17 Feb 2026
30	Grok 4.20 xAI· reasoning	152.0	—	89.3	—	44.9	92.2	—	57.3	2M	$1.25	$2.50	Closed	17 Feb 2026
31	GPT-5 Pro OpenAI· reasoning	150.3	—	—	—	55.8	—	31.6	—	400K	$15.0	$120.0	Closed	7 Oct 2025
32	Claude Opus 4.5 Anthropic· reasoning	150.1	—	—	—	—	—	—	—	200K	$5.00	$25.0	Closed	24 Nov 2025
33	GPT-5 OpenAI· reasoning	150.0	—	86.2	73.6	55.4	91.4	25.3	—	400K	$1.25	$10.0	Closed	7 Aug 2025
34	GPT-5.1 OpenAI· reasoning	149.7	—	87.6	68.0	—	88.6	—	—	400K	$1.25	$10.0	Closed	13 Nov 2025
35	GPT-5.4 Mini OpenAI· reasoning	148.8	24.1	83.6	—	—	87.2	—	—	400K	$0.75	$4.50	Closed	17 Mar 2026
36	o3 Pro OpenAI· reasoning	147.4	—	—	—	—	—	—	—	200K	$20.0	$80.0	Closed	10 Jun 2025
37	Qwen3.7 Plus Alibaba (Qwen)· reasoning	147.4	25.2	87.9	—	34.4	93.3	—	—	1M	$0.32	$1.28	Closed	2 Jun 2026
38	o3 OpenAI· reasoning	146.9	—	81.8	—	33.3	83.9	20.3	—	200K	$2.00	$8.00	Closed	16 Apr 2025
39	Claude Sonnet 4.5 Anthropic· reasoning	146.8	20.7	—	—	—	—	—	—	1M	$3.00	$15.0	Closed	29 Sep 2025
40	GPT-5.4 Nano OpenAI· reasoning	145.8	20.7	78.5	—	44.9	87.8	—	—	400K	$0.20	$1.25	Closed	17 Mar 2026
41	o4 Mini OpenAI· reasoning	145.6	—	79.6	—	36.1	81.7	18.1	—	200K	$1.10	$4.40	Closed	16 Apr 2025
42	GPT-5 Mini OpenAI· reasoning	145.5	16.8	75.0	—	46.7	86.7	—	—	400K	$0.25	$2.00	Closed	7 Aug 2025
43	Gemini 3.5 Flash Lite Google· reasoning	145.1	22.2	83.3	—	26.0	71.1	—	—	1.05M	$0.30	$2.50	Closed	21 Jul 2026
44	Qwen3.7 Flash Alibaba (Qwen)· reasoning	144.6	—	82.3	—	19.3	86.7	—	—	1M	$0.030	$0.13	Closed	27 Jul 2026
45	Gemini 3.1 Flash Lite Google· reasoning	144.4	—	81.8	—	27.7	80.0	8.6	—	1.05M	$0.25	$1.50	Closed	3 Mar 2026
46	Claude Opus 4.1 Anthropic· reasoning	144.1	—	77.3	73.3	12.6	68.9	—	38.0	200K	$15.0	$75.0	Closed	5 Aug 2025
47	Claude Haiku 4.5 Anthropic· reasoning	142.4	16.9	71.2	—	—	66.7	—	29.8	200K	$1.00	$5.00	Closed	15 Oct 2025
48	o1 OpenAI· reasoning	141.9	—	76.8	—	14.7	73.3	—	—	200K	$15.0	$60.0	Closed	17 Dec 2024
49	Claude Sonnet 4 Anthropic· reasoning	141.7	—	79.2	—	—	71.1	—	—	200K	$3.00	$15.0	Closed	22 May 2025
50	GPT-5 Nano OpenAI· reasoning	139.4	—	69.4	—	20.0	81.1	—	—	400K	$0.050	$0.40	Closed	7 Aug 2025
51	GPT-4.1 OpenAI	136.8	—	66.9	48.5	6.0	38.3	5.4	—	1.05M	$2.00	$8.00	Closed	14 Apr 2025
52	GPT-4.1 Mini OpenAI	135.0	—	65.8	—	6.7	44.7	—	—	1.05M	$0.40	$1.60	Closed	14 Apr 2025
53	Mistral Medium 3 Mistral AI	134.1	—	59.5	—	—	32.2	4.5	—	131K	$0.40	$2.00	Closed	7 May 2025
54	GPT-4.1 Nano OpenAI	129.6	—	48.9	—	—	28.9	—	—	1.05M	$0.10	$0.40	Closed	14 Apr 2025
55	GPT-4o-mini OpenAI	126.6	—	37.7	—	0.7	6.9	—	—	128K	$0.15	$0.60	Closed	18 Jul 2024

Showing 55 of 55. Benchmark cells are % (best reported setting). 3.8K benchmark results in total.Export CSV