Claude Sonnet 5.5
anthropic/claude-sonnet-5-5
Creator
AnthropicReleased
2026-09-28Weights
not reportedContext
1M tokens ~Price in / out per Mtok
$2.00 ~ / $10.00 ~OpenRouter routed price — not the vendor's list price, fetched 2026-10-19
State
rankedHealth summary
2 of 2 scores sit on benchmarks that still discriminate. Every number here has been measured independently.
Epoch Capability Index
164.4 (161.3–168.3)
Epoch AI's Capability Index. A composite score with no benchmark health record behind it, so it is never this site's ranking basis and is always attributed. Published by Epoch AI under CC BY 4.0. fetched 2026-10-19
Scores
| Benchmark | Config | Score | Harness | Provenance | Measured | Health |
|---|---|---|---|---|---|---|
| Knowledge | ||||||
| GPQAnearing saturation | max | 95.6% | not reported | ind. | 2026-09-28 | superseded |
| Humanity's Last Examactive | xhigh | 46.1% | not reported | ind. | 2026-09-28 | clear |