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.
Only models with both an ECI score and an OpenRouter price. Normalisation: 75% input + 25% output price. Click a point to open the model.
| # | Model | ECI ↓ | Context | In $/M | Weights | Released |
|---|---|---|---|---|---|---|
| 1 | GPT-6 Astra OpenAI· reasoning | 166.6 | 1.05M | $10.0 | Closed | 3 Sep 2026 |
| 2 | Claude Fable 5.1 Anthropic· reasoning | 165.0 | 1M | $10.0 | Closed | 1 Sep 2026 |
| 3 | Claude Fable 5 Anthropic· reasoning | 163.6 | 1M | $10.0 | Closed | 9 Jun 2026 |
| 4 | Claude Opus 5 Anthropic· reasoning | 162.7 | 1M | $5.00 | Closed | 24 Jul 2026 |
| 5 | GPT-5.5 Pro OpenAI· reasoning | 162.4 | 1.05M | $30.0 | Closed | 23 Apr 2026 |
| 6 | GPT-5.6 Sol OpenAI· reasoning | 162.0 | 1.05M | $2.00 | Closed | 9 Jul 2026 |
| 7 | GPT-5.6 Terra OpenAI· reasoning | 159.3 | 1.05M | $2.00 | Closed | 9 Jul 2026 |
| 8 | GPT-5.5 OpenAI· reasoning | 159.3 | 1.05M | $5.00 | Closed | 23 Apr 2026 |
| 9 | GPT-5.4 Pro OpenAI· reasoning | 159.1 | 1.05M | $30.0 | Closed | 5 Mar 2026 |
| 10 | Claude Opus 4.8 Anthropic· reasoning | 158.3 | 1M | $5.00 | Closed | 28 May 2026 |
| 11 | Gemini 3.7 Flash Google· reasoning | 157.7 | 1.05M | $0.75 | Closed | 13 Aug 2026 |
| 12 | Kimi K3 Moonshot AI· reasoning | 157.7 | 1.05M | $3.00 | Open source | 16 Jul 2026 |
| 13 | Gemini 3.8 Flash Google· reasoning | 157.1 | 1.05M | $0.75 | Closed | 2 Sep 2026 |
| 14 | GPT-5.4 OpenAI· reasoning | 156.9 | 1.05M | $2.50 | Closed | 5 Mar 2026 |
| 15 | Muse Spark 1.3 Meta· reasoning | 156.9 | 1.05M | $1.25 | Closed | 2 Sep 2026 |
| 16 | GPT-5.3-Codex OpenAI· reasoning | 156.8 | 400K | $1.75 | Closed | 5 Feb 2026 |
| 17 | Qwen 3.8 Max | 156.7 | — | — | Closed | 2 Aug 2026 |
| 18 | Grok 4.6 xAI· reasoning | 156.5 | 500K | $2.00 | Closed | 12 Aug 2026 |
| 19 | Claude Opus 4.7 Anthropic· reasoning | 156.4 | 1M | $5.00 | Closed | 16 Apr 2026 |
| 20 | Claude Sonnet 5 Anthropic· reasoning | 156.3 | 1M | $2.00 | Closed | 30 Jun 2026 |
| 21 | GPT-5.6 Luna OpenAI· reasoning | 156.3 | 1.05M | $0.20 | Closed | 9 Jul 2026 |
| 22 | GLM 5.3 Z.ai (Zhipu AI)· reasoning | 155.6 | 1.31M | $1.40 | Open source | 14 Aug 2026 |
| 23 | GPT-5.2 Pro OpenAI· reasoning | 155.4 | 400K | $21.0 | Closed | 11 Dec 2025 |
| 24 | DeepSeek V4 Pro 0813 DeepSeek· reasoning | 155.4 | 1.05M | $0.40 | Open source | 13 Aug 2026 |
| 25 | Claude Opus 4.6 Anthropic· reasoning | 155.4 | 1M | $5.00 | Closed | 5 Feb 2026 |
| 26 | Qwen3.8 Max (0902) Alibaba (Qwen)· reasoning | 155.3 | 1M | $2.00 | Closed | 1 Sep 2026 |
| 27 | Muse Spark 1.2 Meta· reasoning | 155.2 | 1.05M | $1.25 | Closed | 5 Aug 2026 |
| 28 | DeepSeek V4.1 Flash DeepSeek· reasoning | 155.0 | 1.05M | $0.035 | Open source | 9 Sep 2026 |
| 29 | Gemini 3.1 Pro | 154.9 | — | — | Closed | 19 Feb 2026 |
| 30 | Gemini 3.5 Flash Google· reasoning | 154.6 | 1.05M | $1.50 | Closed | 19 May 2026 |
| 31 | DeepSeek V4 Flash 0731 DeepSeek· reasoning | 154.5 | 1.31M | $0.021 | Open source | 31 Jul 2026 |
| 32 | Gemini 3.6 Flash Google· reasoning | 154.4 | 1.05M | $0.75 | Closed | 21 Jul 2026 |
| 33 | Muse Spark 1.1 Meta· reasoning | 154.3 | 1.05M | $1.25 | Closed | 9 Jul 2026 |
| 34 | Grok 4.5 xAI· reasoning | 154.0 | 500K | $2.00 | Closed | 8 Jul 2026 |
| 35 | Qwen3.7 Max Alibaba (Qwen)· reasoning | 153.7 | 1M | $1.48 | Closed | 19 May 2026 |
| 36 | GPT-5.2 OpenAI· reasoning | 153.4 | 400K | $1.75 | Closed | 11 Dec 2025 |
| 37 | Gemini 3 Pro | 153.0 | — | — | Closed | 18 Nov 2025 |
| 38 | Claude Sonnet 4.6 Anthropic· reasoning | 152.3 | 1M | $3.00 | Closed | 17 Feb 2026 |
| 39 | Muse Spark | 152.1 | — | — | Closed | 8 Apr 2026 |
| 40 | Grok 4.20 xAI· reasoning | 152.0 | 2M | $1.25 | Closed | 17 Feb 2026 |
| 41 | GLM 5.3 Flash Z.ai (Zhipu AI)· reasoning | 151.9 | 1.31M | $0.15 | Open source | 20 Aug 2026 |
| 42 | Gemini 3 Flash | 151.8 | — | — | Closed | 17 Dec 2025 |
| 43 | GLM 5.2 Z.ai (Zhipu AI)· reasoning | 151.8 | 1.05M | $0.65 | Open source | 16 Jun 2026 |
| 44 | Kimi K2.6 Moonshot AI· reasoning | 151.0 | 262K | $0.65 | Open source | 20 Apr 2026 |
| 45 | GPT-5 Pro OpenAI· reasoning | 150.3 | 400K | $15.0 | Closed | 7 Oct 2025 |
| 46 | Inkling Small Thinking Machines Lab· reasoning | 150.1 | 524K | $0.45 | Open source | 15 Jul 2026 |
| 47 | Claude Opus 4.5 Anthropic· reasoning | 150.1 | 200K | $5.00 | Closed | 24 Nov 2025 |
| 48 | Kimi K2.7 Code Moonshot AI· reasoning | 150.0 | 262K | $0.66 | Open source | 12 Jun 2026 |
| 49 | GPT-5 OpenAI· reasoning | 150.0 | 400K | $1.25 | Closed | 7 Aug 2025 |
| 50 | GLM 5.1 Z.ai (Zhipu AI)· reasoning | 149.9 | 205K | $0.96 | Open source | 7 Apr 2026 |
| 51 | GPT-5.1 OpenAI· reasoning | 149.7 | 400K | $1.25 | Closed | 13 Nov 2025 |
| 52 | Qwen 3.8 27B | 149.4 | — | — | Open source | 14 Aug 2026 |
| 53 | Qwen 3.6 Max (Preview) | 149.3 | — | — | Closed | 20 Apr 2026 |
| 54 | DeepSeek V4 Pro 0423 DeepSeek· reasoning | 149.1 | 1.05M | $0.95 | Open source | 24 Apr 2026 |
| 55 | Grok 4.3 Beta | 149.1 | — | — | Closed | 17 Apr 2026 |
| 56 | GPT-5.4 Mini OpenAI· reasoning | 148.8 | 400K | $0.75 | Closed | 17 Mar 2026 |
| 57 | Inkling Thinking Machines Lab· reasoning | 148.6 | 524K | $1.00 | Open source | 15 Jul 2026 |
| 58 | Kimi K2.5 Moonshot AI· reasoning | 148.1 | 262K | $0.45 | Open source | 27 Jan 2026 |
| 59 | Qwen 3.6 Plus | 147.7 | — | — | Closed | 31 Mar 2026 |
| 60 | o3 Pro OpenAI· reasoning | 147.4 | 200K | $20.0 | Closed | 10 Jun 2025 |
| 61 | Qwen3.7 Plus Alibaba (Qwen)· reasoning | 147.4 | 1M | $0.32 | Closed | 2 Jun 2026 |
| 62 | MiniMax M3 MiniMax· reasoning | 147.0 | 1.05M | $0.30 | Open source | 1 Jun 2026 |
| 63 | o3 OpenAI· reasoning | 146.9 | 200K | $2.00 | Closed | 16 Apr 2025 |
| 64 | Claude Sonnet 4.5 Anthropic· reasoning | 146.8 | 1M | $3.00 | Closed | 29 Sep 2025 |
| 65 | Qwen 3.5 Plus (hosted 397B-A17B) | 146.8 | — | — | Closed | 16 Feb 2026 |
| 66 | MiniMax M2.5 MiniMax· reasoning | 146.7 | 205K | $0.27 | Open source | 12 Feb 2026 |
| 67 | Qwen3.5 397B A17B Alibaba (Qwen)· reasoning | 146.6 | 262K | $0.55 | Open source | 13 Feb 2026 |
| 68 | Qwen3.6 27B Alibaba (Qwen)· reasoning | 146.5 | 262K | $0.32 | Open source | 22 Apr 2026 |
| 69 | Grok 4 | 146.5 | — | — | Closed | 9 Jul 2025 |
| 70 | DeepSeek V3.2 DeepSeek· reasoning | 146.3 | 164K | $0.28 | Open source | 1 Dec 2025 |
| 71 | Nemotron 3 Ultra NVIDIA· reasoning | 146.2 | 262K | $0.60 | Open source | 4 Jun 2026 |
| 72 | DeepSeek V4 Flash 0423 DeepSeek· reasoning | 146.1 | 1.05M | $0.082 | Open source | 24 Apr 2026 |
| 73 | Kimi K2 Thinking Moonshot AI· reasoning | 146.0 | 262K | $0.60 | Open source | 6 Nov 2025 |
| 74 | MiniMax M2.7 MiniMax· reasoning | 145.8 | 205K | $0.30 | Open source | 18 Mar 2026 |
| 75 | GLM 5 Z.ai (Zhipu AI)· reasoning | 145.8 | 205K | $0.60 | Open source | 11 Feb 2026 |
| 76 | GPT-5.4 Nano OpenAI· reasoning | 145.8 | 400K | $0.20 | Closed | 17 Mar 2026 |
| 77 | o4 Mini OpenAI· reasoning | 145.6 | 200K | $1.10 | Closed | 16 Apr 2025 |
| 78 | GPT-5 Mini OpenAI· reasoning | 145.5 | 400K | $0.25 | Closed | 7 Aug 2025 |
| 79 | Gemini 2.5 Pro (Jun 2025) | 145.3 | — | — | Closed | 5 Jun 2025 |
| 80 | Gemini 3.5 Flash Lite Google· reasoning | 145.1 | 1.05M | $0.30 | Closed | 21 Jul 2026 |
| 81 | DeepSeek V3.2 Exp DeepSeek· reasoning | 145.0 | 164K | $0.27 | Open source | 29 Sep 2025 |
| 82 | Qwen3.7 Flash Alibaba (Qwen)· reasoning | 144.6 | 1M | $0.030 | Closed | 27 Jul 2026 |
| 83 | Gemini 3.1 Flash Lite Google· reasoning | 144.4 | 1.05M | $0.25 | Closed | 3 Mar 2026 |
| 84 | Grok 4 Fast | 144.2 | — | — | Closed | 19 Sep 2025 |
| 85 | Gemini 2.5 Pro (Mar 2025) | 144.2 | — | — | Closed | 31 Mar 2025 |
| 86 | Claude Opus 4.1 Anthropic· reasoning | 144.1 | 200K | $15.0 | Closed | 5 Aug 2025 |
| 87 | Qwen 3.5 Flash (hosted 35B-A3B) | 144.0 | — | — | Closed | 25 Feb 2026 |
| 88 | Qwen 3.6 35B-A3B | 143.9 | — | — | Open source | 14 Apr 2026 |
| 89 | Qwen3-235B-A22B-Thinking (Jul 2025) | 143.9 | — | — | Open source | 25 Jul 2025 |
| 90 | GLM 4.7 Z.ai (Zhipu AI)· reasoning | 143.5 | 205K | $0.60 | Open source | 22 Dec 2025 |
| 91 | Qwen 3.6 Flash | 143.3 | — | — | Closed | 27 Apr 2026 |
| 92 | Gemini 2.5 Flash (Sep 2025) | 143.0 | — | — | Closed | 25 Sep 2025 |
| 93 | Gemma 4 31B Google· reasoning | 142.7 | 262K | $0.090 | Open source | 2 Apr 2026 |
| 94 | Claude Opus 4 | 142.7 | — | — | Closed | 22 May 2025 |
| 95 | Qwen3.5-35B-A3B Alibaba (Qwen)· reasoning | 142.5 | 262K | $0.16 | Open source | 24 Feb 2026 |
| 96 | GPT-5.5 Instant | 142.5 | — | — | Closed | 5 May 2026 |
| 97 | Gemini 2.5 Pro (May 2025) | 142.5 | — | — | Closed | 6 May 2025 |
| 98 | Claude Haiku 4.5 Anthropic· reasoning | 142.4 | 200K | $1.00 | Closed | 15 Oct 2025 |
| 99 | Qwen3 Max Alibaba (Qwen)· reasoning | 142.4 | 262K | $0.78 | Closed | 24 Sep 2025 |
| 100 | o1 OpenAI· reasoning | 141.9 | 200K | $15.0 | Closed | 17 Dec 2024 |