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 |
|---|---|---|---|---|---|---|
| 201 | Qwen3.6 27B Alibaba (Qwen)· reasoning | 146.5 | 262K | $0.32 | Open source | 22 Apr 2026 |
| 202 | Qwen3.5 397B A17B Alibaba (Qwen)· reasoning | 146.6 | 262K | $0.55 | Open source | 13 Feb 2026 |
| 203 | MiniMax M2.5 MiniMax· reasoning | 146.7 | 205K | $0.27 | Open source | 12 Feb 2026 |
| 204 | Qwen 3.5 Plus (hosted 397B-A17B) | 146.8 | — | — | Closed | 16 Feb 2026 |
| 205 | Claude Sonnet 4.5 Anthropic· reasoning | 146.8 | 1M | $3.00 | Closed | 29 Sep 2025 |
| 206 | o3 OpenAI· reasoning | 146.9 | 200K | $2.00 | Closed | 16 Apr 2025 |
| 207 | MiniMax M3 MiniMax· reasoning | 147.0 | 1.05M | $0.30 | Open source | 1 Jun 2026 |
| 208 | Qwen3.7 Plus Alibaba (Qwen)· reasoning | 147.4 | 1M | $0.32 | Closed | 2 Jun 2026 |
| 209 | o3 Pro OpenAI· reasoning | 147.4 | 200K | $20.0 | Closed | 10 Jun 2025 |
| 210 | Qwen 3.6 Plus | 147.7 | — | — | Closed | 31 Mar 2026 |
| 211 | Kimi K2.5 Moonshot AI· reasoning | 148.1 | 262K | $0.45 | Open source | 27 Jan 2026 |
| 212 | Inkling Thinking Machines Lab· reasoning | 148.6 | 524K | $1.00 | Open source | 15 Jul 2026 |
| 213 | GPT-5.4 Mini OpenAI· reasoning | 148.8 | 400K | $0.75 | Closed | 17 Mar 2026 |
| 214 | Grok 4.3 Beta | 149.1 | — | — | Closed | 17 Apr 2026 |
| 215 | DeepSeek V4 Pro 0423 DeepSeek· reasoning | 149.1 | 1.05M | $0.78 | Open source | 24 Apr 2026 |
| 216 | Qwen 3.6 Max (Preview) | 149.3 | — | — | Closed | 20 Apr 2026 |
| 217 | Qwen 3.8 27B | 149.4 | — | — | Open source | 14 Aug 2026 |
| 218 | GPT-5.1 OpenAI· reasoning | 149.7 | 400K | $1.25 | Closed | 13 Nov 2025 |
| 219 | GLM 5.1 Z.ai (Zhipu AI)· reasoning | 149.9 | 205K | $0.96 | Open source | 7 Apr 2026 |
| 220 | GPT-5 OpenAI· reasoning | 150.0 | 400K | $1.25 | Closed | 7 Aug 2025 |
| 221 | Kimi K2.7 Code Moonshot AI· reasoning | 150.0 | 262K | $0.66 | Open source | 12 Jun 2026 |
| 222 | Claude Opus 4.5 Anthropic· reasoning | 150.1 | 200K | $5.00 | Closed | 24 Nov 2025 |
| 223 | Inkling Small Thinking Machines Lab· reasoning | 150.1 | 524K | $0.45 | Open source | 15 Jul 2026 |
| 224 | GPT-5 Pro OpenAI· reasoning | 150.3 | 400K | $15.0 | Closed | 7 Oct 2025 |
| 225 | Kimi K2.6 Moonshot AI· reasoning | 151.0 | 262K | $0.65 | Open source | 20 Apr 2026 |
| 226 | GLM 5.2 Z.ai (Zhipu AI)· reasoning | 151.8 | 1.05M | $0.65 | Open source | 16 Jun 2026 |
| 227 | Gemini 3 Flash | 151.8 | — | — | Closed | 17 Dec 2025 |
| 228 | GLM 5.3 Flash Z.ai (Zhipu AI)· reasoning | 151.9 | 1.31M | $0.15 | Open source | 20 Aug 2026 |
| 229 | Grok 4.20 xAI· reasoning | 152.0 | 2M | $1.25 | Closed | 17 Feb 2026 |
| 230 | Muse Spark | 152.1 | — | — | Closed | 8 Apr 2026 |
| 231 | Claude Sonnet 4.6 Anthropic· reasoning | 152.3 | 1M | $3.00 | Closed | 17 Feb 2026 |
| 232 | Gemini 3 Pro | 153.0 | — | — | Closed | 18 Nov 2025 |
| 233 | GPT-5.2 OpenAI· reasoning | 153.4 | 400K | $1.75 | Closed | 11 Dec 2025 |
| 234 | Qwen3.7 Max Alibaba (Qwen)· reasoning | 153.7 | 1M | $1.48 | Closed | 19 May 2026 |
| 235 | Grok 4.5 xAI· reasoning | 154.0 | 500K | $2.00 | Closed | 8 Jul 2026 |
| 236 | Muse Spark 1.1 Meta· reasoning | 154.3 | 1.05M | $1.25 | Closed | 9 Jul 2026 |
| 237 | Gemini 3.6 Flash Google· reasoning | 154.4 | 1.05M | $0.75 | Closed | 21 Jul 2026 |
| 238 | DeepSeek V4 Flash 0731 DeepSeek· reasoning | 154.5 | 1.31M | $0.021 | Open source | 31 Jul 2026 |
| 239 | Gemini 3.5 Flash Google· reasoning | 154.6 | 1.05M | $1.50 | Closed | 19 May 2026 |
| 240 | Gemini 3.1 Pro | 154.9 | — | — | Closed | 19 Feb 2026 |
| 241 | DeepSeek V4.1 Flash DeepSeek· reasoning | 155.0 | 1.05M | $0.30 | Open source | 9 Sep 2026 |
| 242 | Muse Spark 1.2 Meta· reasoning | 155.2 | 1.05M | $1.25 | Closed | 5 Aug 2026 |
| 243 | Qwen3.8 Max (0902) Alibaba (Qwen)· reasoning | 155.3 | 1M | $2.00 | Closed | 1 Sep 2026 |
| 244 | Claude Opus 4.6 Anthropic· reasoning | 155.4 | 1M | $5.00 | Closed | 5 Feb 2026 |
| 245 | DeepSeek V4 Pro 0813 DeepSeek· reasoning | 155.4 | 1.05M | $0.40 | Open source | 13 Aug 2026 |
| 246 | GPT-5.2 Pro OpenAI· reasoning | 155.4 | 400K | $21.0 | Closed | 11 Dec 2025 |
| 247 | GLM 5.3 Z.ai (Zhipu AI)· reasoning | 155.6 | 1.31M | $0.18 | Open source | 14 Aug 2026 |
| 248 | GPT-5.6 Luna OpenAI· reasoning | 156.3 | 1.05M | $0.20 | Closed | 9 Jul 2026 |
| 249 | Claude Sonnet 5 Anthropic· reasoning | 156.3 | 1M | $2.00 | Closed | 30 Jun 2026 |
| 250 | Claude Opus 4.7 Anthropic· reasoning | 156.4 | 1M | $5.00 | Closed | 16 Apr 2026 |
| 251 | Grok 4.6 xAI· reasoning | 156.5 | 500K | $2.00 | Closed | 12 Aug 2026 |
| 252 | Qwen 3.8 Max | 156.7 | — | — | Closed | 2 Aug 2026 |
| 253 | GPT-5.3-Codex OpenAI· reasoning | 156.8 | 400K | $1.75 | Closed | 5 Feb 2026 |
| 254 | Muse Spark 1.3 Meta· reasoning | 156.9 | 1.05M | $1.25 | Closed | 2 Sep 2026 |
| 255 | GPT-5.4 OpenAI· reasoning | 156.9 | 1.05M | $2.50 | Closed | 5 Mar 2026 |
| 256 | Gemini 3.8 Flash Google· reasoning | 157.1 | 1.05M | $0.75 | Closed | 2 Sep 2026 |
| 257 | Kimi K3 Moonshot AI· reasoning | 157.7 | 1.05M | $3.00 | Open source | 16 Jul 2026 |
| 258 | Gemini 3.7 Flash Google· reasoning | 157.7 | 1.05M | $0.75 | Closed | 13 Aug 2026 |
| 259 | Claude Opus 4.8 Anthropic· reasoning | 158.3 | 1M | $5.00 | Closed | 28 May 2026 |
| 260 | GPT-5.4 Pro OpenAI· reasoning | 159.1 | 1.05M | $30.0 | Closed | 5 Mar 2026 |
| 261 | GPT-5.5 OpenAI· reasoning | 159.3 | 1.05M | $5.00 | Closed | 23 Apr 2026 |
| 262 | GPT-5.6 Terra OpenAI· reasoning | 159.3 | 1.05M | $2.00 | Closed | 9 Jul 2026 |
| 263 | GPT-5.6 Sol OpenAI· reasoning | 162.0 | 1.05M | $2.00 | Closed | 9 Jul 2026 |
| 264 | GPT-5.5 Pro OpenAI· reasoning | 162.4 | 1.05M | $30.0 | Closed | 23 Apr 2026 |
| 265 | Claude Opus 5 Anthropic· reasoning | 162.7 | 1M | $5.00 | Closed | 24 Jul 2026 |
| 266 | Claude Fable 5 Anthropic· reasoning | 163.6 | 1M | $10.0 | Closed | 9 Jun 2026 |
| 267 | Claude Fable 5.1 Anthropic· reasoning | 165.0 | 1M | $10.0 | Closed | 1 Sep 2026 |
| 268 | GPT-6 Astra OpenAI· reasoning | 166.6 | 1.05M | $10.0 | Closed | 3 Sep 2026 |
| 269 | Claude Opus 5.5 Anthropic· reasoning | — | 1M | $4.00 | ? | 22 Sep 2026 |
| 270 | Claude Opus 5.5 (batch) Anthropic· reasoning | — | 1M | $2.00 | ? | 22 Sep 2026 |
| 271 | Claude Fable 5.1 (batch) Anthropic· reasoning | — | 1M | $5.00 | ? | 1 Sep 2026 |
| 272 | GPT-6 Astra (batch) OpenAI· reasoning | — | 1.05M | $5.00 | ? | 4 Sep 2026 |
| 273 | Claude Opus 5 (batch) Anthropic· reasoning | — | 1M | $2.50 | ? | 24 Jul 2026 |
| 274 | Claude Fable 5 (batch) Anthropic· reasoning | — | 1M | $5.00 | ? | 9 Jun 2026 |
| 275 | GPT-6 Sol OpenAI· reasoning | — | 1.05M | $2.00 | ? | 22 Sep 2026 |
| 276 | GPT-6 Sol (batch) OpenAI· reasoning | — | 1.05M | $1.00 | ? | 22 Sep 2026 |
| 277 | GPT-5.6 Sol (batch) OpenAI· reasoning | — | 1.05M | $1.00 | ? | 9 Jul 2026 |
| 278 | Grok 4.7 xAI· reasoning | — | 500K | $1.60 | ? | 21 Sep 2026 |
| 279 | MiMo-V2.6-Pro Xiaomi· reasoning | — | 1.05M | $0.43 | Open source | 21 Sep 2026 |
| 280 | GLM 5.3 (batch) Z.ai (Zhipu AI)· reasoning | — | 1.05M | $0.45 | Open source | 18 Aug 2026 |
| 281 | Kimi K3 (batch) Moonshot AI· reasoning | — | 1.05M | $2.28 | Open source | 16 Jul 2026 |
| 282 | GPT-5.6 Terra (batch) OpenAI· reasoning | — | 1.05M | $1.00 | ? | 9 Jul 2026 |
| 283 | GLM 5.3 Flash (batch) Z.ai (Zhipu AI)· reasoning | — | 1.05M | $0.060 | Open source | 26 Aug 2026 |
| 284 | Claude Opus 4.8 (batch) Anthropic· reasoning | — | 1M | $2.50 | ? | 27 May 2026 |
| 285 | Gemini 3.8 Flash (batch) Google· reasoning | — | 1.05M | $0.38 | ? | 2 Sep 2026 |
| 286 | Qwen3.8 2.4T A95B Alibaba (Qwen)· reasoning | — | 1.05M | $2.00 | Open source | 12 Aug 2026 |
| 287 | DeepSeek V4.1 Flash (batch) DeepSeek· reasoning | — | 1.05M | $0.11 | Open source | 10 Sep 2026 |
| 288 | Gemini 3.7 Flash (batch) Google· reasoning | — | 1.05M | $0.38 | ? | 13 Aug 2026 |
| 289 | GPT-5.5 (batch) OpenAI· reasoning | — | 1.05M | $2.50 | ? | 24 Apr 2026 |
| 290 | Claude Sonnet 5 (batch) Anthropic· reasoning | — | 1M | $1.00 | ? | 30 Jun 2026 |
| 291 | MiMo-V2.6-Flash Xiaomi· reasoning | — | 1.05M | $0.14 | Open source | 21 Sep 2026 |
| 292 | GPT-6 Luna OpenAI· reasoning | — | 1.05M | $0.10 | ? | 22 Sep 2026 |
| 293 | GPT-6 Luna (batch) OpenAI· reasoning | — | 1.05M | $0.050 | ? | 22 Sep 2026 |
| 294 | GPT-5.6 Luna (batch) OpenAI· reasoning | — | 1.05M | $0.10 | ? | 9 Jul 2026 |
| 295 | Gemini 3.6 Flash (batch) Google· reasoning | — | 1.05M | $0.38 | ? | 21 Jul 2026 |
| 296 | Qwen3.8 27B Alibaba (Qwen)· reasoning | — | 1M | $0.42 | Open source | 14 Aug 2026 |
| 297 | Gemini 3.5 Flash (batch) Google· reasoning | — | 1.05M | $0.75 | ? | 19 May 2026 |
| 298 | Claude Sonnet 4.6 (batch) Anthropic· reasoning | — | 1M | $1.50 | ? | 17 Feb 2026 |
| 299 | Gemini 3.1 Pro Preview Google· reasoning | — | 1.05M | $2.00 | ? | 19 Feb 2026 |
| 300 | Gemini 3.1 Pro Preview (batch) Google· reasoning | — | 1.05M | $1.00 | ? | 19 Feb 2026 |