Indicators / series
epoch_bench.claude_opus_5_5.eci_closed.pt
Source: Epoch AI benchmarks and Capabilities Index (Epoch AI) · CC BY 4.0 · CSV
Epoch AI, Benchmarking Hub and Epoch Capabilities Index (CC BY 4.0)
| id | value | grade | as of date | published date | tier | audited vs reported | extraction method | review status | retrieved at | http status | content hash | supersedes id | url | flags |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 85998bc7faf19529 | 168 index (165–173) | grade A, evidence tier 1 | 2026-09-22 | 2026-09-22 | 1 | reported | api | approved | 2026-10-31 12:46 | 200 | 27a1abe52359 | 1fa3b464a63378f1 | source page |
Raw snippets and dispute text
- 85998bc7faf19529 {"Accessibility group": "Closed weights", "Display name": "Claude Opus 5.5", "Model": "Claude Opus 5.5", "Organization": "Anthropic", "date": "2026-09-22", "eci": "168.4", "eci_ci_high": "173.03", "eci_ci_low": "165.37"}