Pricing and context window via OpenRouter, 2026-11-07.
Opus 5.5 lowers output pricing to $20 per million tokens from $25 and improves inference speed through reduced compute requirements, while also revising response style to prioritize key information and reduce jargon.
| Benchmark | Score | Rank | Source |
|---|---|---|---|
| AA Intelligence Index | 59.1 index | 2 of 124 | Artificial Analysis, Nov 2026 ↗ |
| Arena Elo | 1509 Elo | 3 of 151 | LMArena, Oct 2026 ↗ |
| Speed (tok/s) | 94 tok/s | 63 of 127 | Artificial Analysis, Nov 2026 ↗ |
| Hallucination Rate (lower is better) | 20.9% | 4 of 109 | Artificial Analysis, Oct 2026 ↗ |
Rank is against every model in our database with a sourced score on that benchmark, each counted once with its best score.
Anthropic released Claude Opus 5.5 on Tuesday, cutting output token pricing to $20 per million tokens from $25 while improving coding and knowledge-work performance. The model arrives as Anthropic CEO Dario Amodei has pledged to slow capability advances to match safety work.