Claude Fable 5.1 now available on AI Gateway

UpdateSep 1, 2026VerifiedAdded Sep 22, 2026

Claude Fable 5.1 from Anthropic is now available on AI Gateway. Fable 5.1 improvements compared to previous Claude models are concentrated in long, multi-stage work like agentic coding, knowledge work, and research that takes several rounds of searching and following up. Anthropic ships Fable 5.1 with cybersecurity and biology safety classifiers enabled.

AI agents LLMs Security Developer tools Coding agents

Read Vercel's release notes

https://vercel.com/changelog/claude-fable-5-1-now-available-on-ai-gateway

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

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