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 |
|---|---|
| GPT-5.6 Sol | 162 |
| Claude Fable 5 | 162 |
| GPT-5.5 Pro | 162 |
| Claude Opus 5 | 161 |
| GPT-5.5 | 159 |
| GPT-5.6 Terra | 159 |
| GPT-5.4 Pro | 158 |
| Opus 4.8 | 158 |
| Kimi K3 | 157 |
| GPT-5.4 | 157 |
| Opus 4.7 | 156 |
| GPT-5.6 Luna | 156 |
| GPT-5.3-Codex | 156 |
| Muse Spark 1.1 | 155 |
| Sonnet 5 | 155 |
| Opus 4.6 | 155 |
| GPT-5.2 Pro | 155 |
| Gemini 3.1 Pro Preview | 155 |
| Gemini 3.5 Flash | 155 |
| Gemini 3.6 Flash | 154 |
| Grok 4.5 | 154 |
| Qwen3.7-Max | 154 |
| GPT-5.2 | 153 |
| Gemini 3 Pro Preview | 153 |
| Muse Spark | 153 |
| Sonnet 4.6 | 152 |
| Grok 4.20 | 152 |
| GLM-5.2 | 152 |
| Kimi K2.6 | 151 |
| GLM-5.1 | 151 |
| Gemini 3 Flash Preview | 151 |
| GPT-5 Pro | 150 |
| Kimi K2.7 Code | 150 |
| GPT-5 | 150 |
| GPT-5.1-Codex-Max | 150 |
| Opus 4.5 | 150 |
| GPT-5.1 | 150 |
| Qwen3.6-Max-Preview | 149 |
| GPT-5.4 Mini | 149 |
| Qwen3.6 Plus (2026-04-02) | 149 |