Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...
In / out price$4.00/$20.00per 1M tokens
Context
1M tokens
Parameters
Undisclosed
Modalities
→
Released
Sep 22, 2026
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Net score over time
Oct 14 · +1Reviews (0)
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