Claude Opus 5.5 now available on AI Gateway

UpdateSep 22, 2026VerifiedAdded Sep 22, 2026

Claude Opus 5.5 from Anthropic is now available on AI Gateway . It is a step-change improvement over Opus 5 , with its biggest gains in agentic coding, long-running agent tasks, and knowledge work. Anthropic cites that Opus 5.5 performs at the level of Fable 5.1, but ~30% faster and ~40% cheaper than Opus 5 per task.

AI agents LLMs Developer tools Coding agents Performance

Read Vercel's release notes

https://vercel.com/changelog/claude-opus-5-5-now-available-on-ai-gateway

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