Epoch Capabilities Index (ECI)
Indexes · 2025-10-28
The Epoch Capabilities Index aggregates performance across a broad suite of AI benchmarks into a single capabilities score. Higher index values indicate stronger aggregate performance.
Top models (higher is better)
| Model | Score |
|---|---|
| Claude Opus 5.5 | 169 |
| GPT-6 Astra | 169 |
| GPT-6.1 Sol | 168 |
| Claude Fable 5.1 | 166 |
| Gemini 4 Argon | 166 |
| Claude Sonnet 5.5 | 166 |
| Claude Opus 5 | 164 |
| GPT-6 Sol | 164 |
| Claude Fable 5 | 163 |
| GPT-5.5 Pro | 163 |
| GPT-5.6 Sol | 163 |
| Muse Wonder | 162 |
| GPT-5.6 Terra | 160 |
| GPT-5.5 | 160 |
| GPT-5.4 Pro | 160 |
| Claude Haiku 5.5 | 159 |
| Opus 4.8 | 159 |
| Gemini 3.7 Flash | 158 |
| Kimi K3 | 158 |
| Gemini 3.8 Flash | 157 |
| Qwen3.8-Max | 157 |
| GPT-5.4 | 157 |
| Muse Spark 1.3 | 157 |
| GPT-5.3-Codex | 157 |
| Sonnet 5 | 157 |
| Opus 4.7 | 157 |
| GPT-6 Luna | 157 |
| Grok 4.6 | 157 |
| GPT-5.6 Luna | 157 |
| GPT-5.2 Pro | 156 |
| GLM-5.3 | 156 |
| DeepSeek V4.1 Flash | 156 |
| Opus 4.6 | 156 |
| DeepSeek V4 Pro 0813 | 156 |
| Gemini 3.1 Pro Preview | 155 |
| Muse Spark Open | 155 |
| Qwen3.8 Max (0902) | 155 |
| Muse Spark 1.2 | 155 |
| Gemini 3.5 Flash | 155 |
| DeepSeek-V4-Flash-0731 | 155 |