Claude Opus 5.5 vs Claude Sonnet 5.5
Claude Sonnet 5.5 leads on 1 of 1 benchmarks where both are measured. Specs, per-token pricing, and live benchmark scores — refreshed daily from our benchmark database.
Specs & pricing
| Claude Opus 5.5 | Claude Sonnet 5.5 | |
|---|---|---|
| Company | Anthropic | Anthropic |
| Released | Sep 2026 | Sep 2026 |
| Context window | 1.0M | 1.0M |
| Input /1M tokens | $4 | $2 |
| Output /1M tokens | $20 | $10 |
| Open weights | No | No |
Benchmarks
| Benchmark | Claude Opus 5.5 | Claude Sonnet 5.5 |
|---|---|---|
| Speed (tok/s) | 97 tok/s | 134 tok/s |
Scores come from published leaderboards and official model cards (sources listed on the benchmarks page) and refresh daily. Pricing via vendor pages and OpenRouter.