Anthropic

Opus 5.5

The first model in Anthropic’s Claude 5.5 family, performing at Fable 5.1 level on most work at 40% lower cost, and state of the art on agentic coding and long-horizon knowledge work.

API pricing: $4.00 in / $20.00 out per million tokens

Opus 5.5 benchmark scores

Compare Opus 5.5