TestsBenchmarks · Reasoning
Epoch Capabilities Index
Epoch AI composite capability score stitched across many benchmarks onto one scale.
Measured by independent testersIndependent Reported by the makerVendor-reported
| Thinking levelSetting | |||||||
|---|---|---|---|---|---|---|---|
| 1 | Claude Opus 5.5 | Anthropic | 167.3 | Default | Independent testIndependentEpoch AI ↗ | — | 1 Oct 2026 |
| 2 | GPT-6 Astra | OpenAI | 166.5 | Default | Independent testIndependentEpoch AI ↗ | — | 1 Oct 2026 |
| 3 | Claude Sonnet 5.5 | Anthropic | 165.2 | Default | Independent testIndependentEpoch AI ↗ | — | 1 Oct 2026 |
| 4 | Claude Fable 5.1 | Anthropic | 164.8 | Default | Independent testIndependentEpoch AI ↗ | — | 1 Oct 2026 |
| 5 | Claude Opus 5 | Anthropic | 162.9 | Default | Independent testIndependentEpoch AI ↗ | — | 1 Oct 2026 |
| 6 | GPT-5.5 Pro | OpenAI | 162.4 | Default | Independent testIndependentEpoch AI ↗ | — | 1 Oct 2026 |
| 7 | Claude Fable 5 | Anthropic | 162.2 | Default | Independent testIndependentEpoch AI ↗ | — | 1 Oct 2026 |
| 8 | GPT-5.6 Sol | OpenAI | 161.8 | Default | Independent testIndependentEpoch AI ↗ | — | 1 Oct 2026 |
| 9 | GPT-5.6 Terra | OpenAI | 159.8 | Default | Independent testIndependentEpoch AI ↗ | — | 1 Oct 2026 |
| 10 | GPT-5.5 | OpenAI | 159.2 | Default | Independent testIndependentEpoch AI ↗ | — | 1 Oct 2026 |
| 11 | GPT-5.4 Pro | OpenAI | 159.1 | Default | Independent testIndependentEpoch AI ↗ | — | 1 Oct 2026 |
| 12 | Claude Opus 4.8 | Anthropic | 158.3 | Default | Independent testIndependentEpoch AI ↗ | — | 1 Oct 2026 |
| 13 | Kimi K3 | Moonshot AI (Kimi) | 157.6 | Default | Independent testIndependentEpoch AI ↗ | — | 1 Oct 2026 |
| 14 | Gemini 3.7 Flash | Google (Gemini / DeepMind) | 157.4 | Default | Independent testIndependentEpoch AI ↗ | — | 1 Oct 2026 |
| 15 | Gemini 3.8 Flash | Google (Gemini / DeepMind) | 156.9 | Default | Independent testIndependentEpoch AI ↗ | — | 1 Oct 2026 |
| 16 | GPT-5.4 | OpenAI | 156.9 | Default | Independent testIndependentEpoch AI ↗ | — | 1 Oct 2026 |
| 17 | Muse Spark 1.3 | Meta (Meta Superintelligence Labs, Muse) | 156.9 | Default | Independent testIndependentEpoch AI ↗ | — | 1 Oct 2026 |
| 18 | GPT-5.3-Codex | OpenAI | 156.8 | Default | Independent testIndependentEpoch AI ↗ | — | 1 Oct 2026 |
| 19 | Grok 4.6 | SpaceXAI (formerly xAI) | 156.6 | Default | Independent testIndependentEpoch AI ↗ | — | 1 Oct 2026 |
| 20 | GPT-5.6 Luna | OpenAI | 156.4 | Default | Independent testIndependentEpoch AI ↗ | — | 1 Oct 2026 |
| 21 | Claude Opus 4.7 | Anthropic | 156.3 | Default | Independent testIndependentEpoch AI ↗ | — | 1 Oct 2026 |
| 22 | GLM-5.3 | Z.ai (Zhipu) | 155.8 | Default | Independent testIndependentEpoch AI ↗ | — | 1 Oct 2026 |