Claude 5.5

Anthropic has released Claude Sonnet 5.5, the second model in its Claude 5.5 family following last week's Opus 5.5. The model runs more than 30% faster and costs up to 30% less for most work while keeping Sonnet 5's per-token pricing.

Anthropic has released Claude Sonnet 5.5, the second model in its Claude 5.5 family, delivering major coding and knowledge-work gains that approach flagship Opus 5.5 performance while using up to 30% fewer tokens per task. Per-token pricing stays unchanged at $2/$10 per million input/output tokens.