Anthropic model for coding and knowledge work
Category: Text & Copy. Pricing: priced per the vendor's website. Last modified: 2026-09-11.
Claude Fable 5.1 is Anthropic's generally available 2026-09-01 model release for coding and knowledge work. Anthropic says Fable 5.1 and the restricted Mythos 5.1 offering use the same base model, but they are distinct access offerings: Mythos remains limited to trusted programs and is not represented here as publicly available. The official model documentation lists a 1 million token context window, a 128,000 token maximum output, and API prices of $10 per million input tokens and $50 per million output tokens. Those are usage-based API rates, not Claude monthly subscription prices. Official sources: https://www.anthropic.com/claude-fable-and-mythos-5-1 and https://platform.claude.com/docs/en/models/fable-5-1/overview
Not editorially tested: One AI Guide has not published a complete hands-on test record for this tool.
Published by LUMIVEX for One AI Guide.
Editorial lead: Said El Moussaoui. Our methodology is published at /how-we-rate.
Official vendor website: see the vendor link below.
Claude Fable 5.1 is a text & copy tool. Anthropic model for coding and knowledge work.
The One AI Guide catalog currently records Claude Fable 5.1 as priced per the vendor's website. This is a directory summary, not a current vendor quote; always check the vendor's site for the latest plans before signing up.
The catalog does not currently record Claude Fable 5.1 as Free or Freemium. That is not proof that no trial or limited offer exists; check the vendor's site for current options.
Common use cases include Software development, Document analysis, Knowledge work, and Long-context synthesis.
The One AI Guide catalog currently highlights these strengths: Generally available model release; 1 million token context window; 128,000 token maximum output.