Claude Opus 5.5 launched, first model in the Claude 5.5 family

GASep 22, 2026VerifiedAdded Sep 22, 2026

Anthropic launched Claude Opus 5.5, the first model in the Claude 5.5 family. It performs at the level of Claude Fable 5.1 on most work and costs 40% less to run than Opus 5.

LLMs Pricing

Read Anthropic's release notes

https://support.claude.com/en/articles/12138966-release-notes#h_1ff986cf68

Summaries of vendors' own notes. Product names and logos belong to their owners; logos via logo.dev.

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Also shipped on Sep 22, 2026

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