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 |
|---|---|---|---|---|---|---|
| 401 | Hy-MT2-1.8B | — | 8K | $0.044 | Open source | 20 Aug 2026 |
| 402 | Hy-MT2-30B-A3B | — | 8K | $0.074 | Open source | 20 Aug 2026 |
| 403 | GLM-5.3-Flash (unknown) | — | — | — | Open source | 20 Aug 2026 |
| 404 | Hy-MT2-7B | — | 8K | $0.074 | Open source | 19 Aug 2026 |
| 405 | GLM-5.3 (unknown thinking) | — | — | — | Closed | 14 Aug 2026 |
| 406 | Qwen3.8 27B (xhigh) | — | — | — | Open source | 14 Aug 2026 |
| 407 | Gemini 3.7 Flash (medium) | — | — | — | Closed | 13 Aug 2026 |
| 408 | DeepSeek V4 Pro 0813 (low) | — | — | — | Open source | 13 Aug 2026 |
| 409 | Gemini 3.7 Flash (low) | — | — | — | Closed | 13 Aug 2026 |
| 410 | DeepSeek V4 Pro 0813 (none) | — | — | — | Open source | 13 Aug 2026 |
| 411 | Gemini 3.7 Flash (unknown) | — | — | — | Closed | 13 Aug 2026 |
| 412 | DeepSeek V4 Pro 0813 (unknown) | — | — | — | Open source | 13 Aug 2026 |
| 413 | Seed-2.0-Code ByteDance· reasoning | — | 262K | $0.50 | ? | 12 Aug 2026 |
| 414 | Seed 2.1 Turbo ByteDance· reasoning | — | 262K | $0.50 | ? | 12 Aug 2026 |
| 415 | Grok 4.6 (xhigh) | — | — | — | Closed | 12 Aug 2026 |
| 416 | Grok 4.6 (medium) | — | — | — | Closed | 12 Aug 2026 |
| 417 | Grok 4.6 (low) | — | — | — | Closed | 12 Aug 2026 |
| 418 | Grok 4.6 (unknown) | — | — | — | Closed | 12 Aug 2026 |
| 419 | Sakana Namazu Sakana AI· reasoning | — | 262K | $0.95 | ? | 11 Aug 2026 |
| 420 | Solar Pro 4 Upstage· reasoning | — | 524K | $0.090 | ? | 10 Aug 2026 |
| 421 | Muse Glimmer 30B Meta· reasoning | — | 131K | $0.30 | Open source | 9 Aug 2026 |
| 422 | Muse Spark 1.2 (xhigh) | — | — | — | Closed | 5 Aug 2026 |
| 423 | Qwen3.8 Max (xhigh) | — | — | — | Closed | 2 Aug 2026 |
| 424 | Qwen3.8 Max (unknown) | — | — | — | Closed | 2 Aug 2026 |
| 425 | DeepSeek V4 Flash 0731 (low) | — | — | — | Open source | 31 Jul 2026 |
| 426 | DeepSeek V4 Flash 0731 (none) | — | — | — | Open source | 31 Jul 2026 |
| 427 | DeepSeek V4 Flash 0731 (unknown) | — | — | — | Open source | 31 Jul 2026 |
| 428 | Claude Opus 5 (low) | — | — | — | Closed | 24 Jul 2026 |
| 429 | Claude Opus 5 (unknown) | — | — | — | Closed | 24 Jul 2026 |
| 430 | Claude Opus 5 (xhigh) | — | — | — | Closed | 24 Jul 2026 |
| 431 | Claude Opus 5 (medium) | — | — | — | Closed | 24 Jul 2026 |
| 432 | Ling 3.0 Flash inclusionAI (Ant Group)· reasoning | — | 262K | $0.021 | Open source | 23 Jul 2026 |
| 433 | Laguna S 2.1 Poolside· reasoning | — | 1.05M | $0.090 | Open source | 21 Jul 2026 |
| 434 | Gemini 3.6 Flash (medium) | — | — | — | Closed | 21 Jul 2026 |
| 435 | Gemini 3.5 Flash-Lite (medium) | — | — | — | Closed | 21 Jul 2026 |
| 436 | Kimi K3 (low) | — | — | — | Open source | 16 Jul 2026 |
| 437 | Kimi K3 (unknown) | — | — | — | Open source | 16 Jul 2026 |
| 438 | Inkling Small (xhigh) | — | — | — | Open source | 15 Jul 2026 |
| 439 | Inkling (xhigh) | — | — | — | Open source | 15 Jul 2026 |
| 440 | Inkling Small (medium) | — | — | — | Open source | 15 Jul 2026 |
| 441 | Inkling Small (low) | — | — | — | Open source | 15 Jul 2026 |
| 442 | Inkling Small (minimal) | — | — | — | Open source | 15 Jul 2026 |
| 443 | Inkling Small (none) | — | — | — | Open source | 15 Jul 2026 |
| 444 | KAT-Coder-Pro V2.5 | — | 262K | $0.74 | ? | 10 Jul 2026 |
| 445 | GPT-5.6 Sol Pro OpenAI· reasoning | — | 1.05M | $4.00 | ? | 9 Jul 2026 |
| 446 | GPT-5.6 Luna Pro OpenAI· reasoning | — | 1.05M | $0.20 | ? | 9 Jul 2026 |
| 447 | GPT-5.6 Terra Pro OpenAI· reasoning | — | 1.05M | $2.00 | ? | 9 Jul 2026 |
| 448 | GPT-5.6 Sol Pro (batch) OpenAI· reasoning | — | 1.05M | $1.00 | ? | 9 Jul 2026 |
| 449 | GPT-5.6 Luna Pro (batch) OpenAI· reasoning | — | 1.05M | $0.10 | ? | 9 Jul 2026 |
| 450 | GPT-5.6 Terra Pro (batch) OpenAI· reasoning | — | 1.05M | $1.00 | ? | 9 Jul 2026 |
| 451 | GPT-5.6 Sol (none) | — | — | — | Closed | 9 Jul 2026 |
| 452 | GPT-5.6 Terra (none) | — | — | — | Closed | 9 Jul 2026 |
| 453 | GPT-5.6 Sol (low) | — | — | — | Closed | 9 Jul 2026 |
| 454 | GPT-5.6 Luna (none) | — | — | — | Closed | 9 Jul 2026 |
| 455 | GPT-5.6 Terra (low) | — | — | — | Closed | 9 Jul 2026 |
| 456 | GPT-5.6 Luna (low) | — | — | — | Closed | 9 Jul 2026 |
| 457 | GPT-5.6 Sol (pro, max) | — | — | — | Closed | 9 Jul 2026 |
| 458 | GPT-5.6 Terra (medium) | — | — | — | Closed | 9 Jul 2026 |
| 459 | GPT-5.6 Luna (medium) | — | — | — | Closed | 9 Jul 2026 |
| 460 | GPT-5.6 Sol (xhigh) | — | — | — | Closed | 9 Jul 2026 |
| 461 | GPT-5.6 Terra (xhigh) | — | — | — | Closed | 9 Jul 2026 |
| 462 | GPT-5.6 Sol (medium) | — | — | — | Closed | 9 Jul 2026 |
| 463 | GPT-5.6 Luna (xhigh) | — | — | — | Closed | 9 Jul 2026 |
| 464 | GPT-5.6 Sol (pro, xhigh) | — | — | — | Closed | 9 Jul 2026 |
| 465 | GPT-5.6 Sol (pro, unknown thinking) | — | — | — | Closed | 9 Jul 2026 |
| 466 | GPT-5.6 Sol (unknown thinking) | — | — | — | Closed | 9 Jul 2026 |
| 467 | GPT-5.6 Terra (unknown thinking) | — | — | — | Closed | 9 Jul 2026 |
| 468 | GPT-5.6 Luna (unknown thinking) | — | — | — | Closed | 9 Jul 2026 |
| 469 | Grok 4.5 (medium) | — | — | — | Closed | 8 Jul 2026 |
| 470 | Grok 4.5 (low) | — | — | — | Closed | 8 Jul 2026 |
| 471 | Grok 4.5 (unknown thinking) | — | — | — | Closed | 8 Jul 2026 |
| 472 | SWE-1.7 | — | — | — | ? | 8 Jul 2026 |
| 473 | Aion-3.0 AionLabs· reasoning | — | 131K | $3.00 | ? | 7 Jul 2026 |
| 474 | Aion-3.0-Mini AionLabs· reasoning | — | 131K | $0.70 | ? | 7 Jul 2026 |
| 475 | Hy3 Tencent· reasoning | — | 262K | $0.083 | Open source | 6 Jul 2026 |
| 476 | Laguna XS 2.1 Poolside· reasoning | — | 262K | $0.060 | Open source | 2 Jul 2026 |
| 477 | Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) Google· reasoning | — | 66K | $0.25 | ? | 30 Jun 2026 |
| 478 | Claude Sonnet 5 (xhigh) | — | — | — | Closed | 30 Jun 2026 |
| 479 | Claude Sonnet 5 (no thinking) | — | — | — | Closed | 30 Jun 2026 |
| 480 | Claude Sonnet 5 (unknown thinking) | — | — | — | Closed | 30 Jun 2026 |
| 481 | Claude Sonnet 5 (medium) | — | — | — | Closed | 30 Jun 2026 |
| 482 | Claude Sonnet 5 (low) | — | — | — | Closed | 30 Jun 2026 |
| 483 | Fugu Ultra Sakana AI· reasoning | — | 1M | $5.00 | ? | 24 Jun 2026 |
| 484 | Nano Banana Pro (Gemini 3 Pro Image) Google· reasoning | — | 131K | $2.00 | ? | 18 Jun 2026 |
| 485 | Nano Banana 2 (Gemini 3.1 Flash Image) Google· reasoning | — | 131K | $0.50 | ? | 18 Jun 2026 |
| 486 | Claude Fable 5 (low) | — | — | — | Closed | 9 Jun 2026 |
| 487 | Claude Fable 5 (xhigh) | — | — | — | Closed | 9 Jun 2026 |
| 488 | Claude Fable 5 (medium) | — | — | — | Closed | 9 Jun 2026 |
| 489 | Claude Fable 5 (unknown) | — | — | — | Closed | 9 Jun 2026 |
| 490 | Nemotron 3.5 Content Safety NVIDIA· reasoning | — | 131K | $0.20 | Open source | 4 Jun 2026 |
| 491 | Step 3.7 Flash StepFun· reasoning | — | 262K | $0.20 | Open source | 28 May 2026 |
| 492 | Grok Build 0.1 xAI· reasoning | — | 256K | $1.00 | ? | 20 May 2026 |
| 493 | Composer 2.5 | — | — | — | Closed | 18 May 2026 |
| 494 | Perceptron Mk1 Perceptron· reasoning | — | 33K | $0.15 | ? | 12 May 2026 |
| 495 | AI co-mathematician | — | — | — | Closed | 8 May 2026 |
| 496 | Gemini 3.1 Flash Lite (batch) Google· reasoning | — | 1.05M | $0.13 | ? | 7 May 2026 |
| 497 | GPT Chat Latest | — | 400K | $5.00 | ? | 5 May 2026 |
| 498 | Laguna M.1 | — | — | — | ? | 28 Apr 2026 |
| 499 | Laguna XS.2 | — | — | — | Open source | 28 Apr 2026 |
| 500 | Qwen3.6 Flash Alibaba (Qwen)· reasoning | — | 1M | $0.19 | ? | 27 Apr 2026 |