Best score reached on each track, held flat until something beats it. The horizontal distance between the two staircases is time: how long the best downloadable model takes to reach a level hosted models already passed.
60 of 60 scored models, one row per model line
| # | Model | ECI |
|---|---|---|
| 1 | Proprietary model: Claude Fable 5Anthropic · Proprietary model | 162.3 |
| 2 | Proprietary model: GPT-5.5 ProOpenAI · Proprietary model | 161.6 |
| 3 | Proprietary model: Claude Opus 5Anthropic · Proprietary model | 161.2 |
| 4 | Open weights: Kimi K3Moonshot · Open weights | 157.1 |
| 5 | Proprietary model: Gemini 3.7 FlashGoogle DeepMind · Proprietary model | 156.4 |
| 6 | Proprietary model: Qwen 3.8 MaxAlibaba · Proprietary model | 156.1 |
| 7 | Proprietary model: Claude Sonnet 5Anthropic · Proprietary model | 155.5 |
| 8 | Proprietary model: Grok 4.6xAI · Proprietary model | 154.9 |
| 9 | Proprietary model: Muse Spark 1.1Meta AI · Proprietary model | 154.7 |
| 10 | Open weights: DeepSeek V4 Flash 0731DeepSeek · Open weights | 152.9 |
| 11 | Open weights: GLM-5.2Z.ai (Zhipu AI) · Open weights | 152.2 |
| 12 | Open weights: Kimi K2.7 CodeMoonshot · Open weights | 150.4 |
| 13 | Proprietary model: Qwen 3.6 PlusAlibaba · Proprietary model | 149.3 |
| 14 | Proprietary model: Grok 4.3 BetaxAI · Proprietary model | 148.9 |
| 15 | Open weights: InklingThinking Machines · Open weights | 148.8 |
| 16 | Open weights: Inkling-SmallThinking Machines · Open weights | 147.7 |
| 17 | Proprietary model: o3-proOpenAI · Proprietary model | 147.5 |
| 18 | Open weights: MiniMax-M3MiniMax · Open weights | 147.4 |
| 19 | Proprietary model: o3OpenAI · Proprietary model | 147.0 |
| 20 | Proprietary model: o4-miniOpenAI · Proprietary model | 146.3 |
| 21 | Proprietary model: GPT-5.4 NanoOpenAI · Proprietary model | 146.2 |
| 22 | Proprietary model: Gemini 3.1 Flash-LiteGoogle · Proprietary model | 144.9 |
| 23 | Proprietary model: Grok 4 FastxAI · Proprietary model | 144.5 |
| 24 | Proprietary model: GPT-5.5 InstantOpenAI · Proprietary model | 143.3 |
| 25 | Open weights: Nemotron 3 UltraNVIDIA · Open weights | 142.8 |
Scores: Epoch AI Capabilities Index (CC BY), retrieved Aug 13, 2026
From the blog
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