Indicators / series
epoch_bench.claude_opus_4.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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| eed736d2a075f66b | 143 index (141–144) | grade A, evidence tier 1 | 2025-05-22 | 2025-05-22 | 1 | reported | api | approved | 2026-09-10T06:33:11.514623Z | 200 | cde2f74ecf00 | — | source page |
Raw snippets and dispute text
- eed736d2a075f66b {"Accessibility group": "Closed weights", "Display name": "Claude Opus 4", "Model": "Claude Opus 4", "Organization": "Anthropic", "date": "2025-05-22", "eci": "142.68", "eci_ci_high": "144.11", "eci_ci_low": "140.58"}