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Claude Fable 5.2 Available on AI Gateway with Mandatory Data Retention

·2026.11.09 09:00

Key point

The model supports long unattended tasks and orchestrates smaller models, but requires 30-day data retention and rejects Zero Data Retention requests.

Details

  • Claude Fable 5.2 from Anthropic is now available on AI Gateway, built for open-ended technical work with improvements in coding, reasoning, and vision.
  • Access requires data retention: prompts and completions are retained for 30 days and are not used for training; Zero Data Retention (ZDR) is not supported, causing AI Gateway to return an error if ZDR is enabled.
  • The model can run long, ambiguous tasks unattended and acts as an orchestrator for smaller models or an advisor for other Claude models, with effort levels ranging from low to max (high is the API default).
  • Cybersecurity and biology safety classifiers are enabled; users can configure model fallbacks in providerOptions.gateway to route requests to Opus 5.5 or Sonnet 5.5 if the cybersecurity classifier declines a request.
  • Available via AI SDK, Chat Completions, Responses, and Anthropic Messages APIs using the model name anthropic/claude-fable-5.2, with AI Gateway reflecting provider pricing without markup or platform fees.
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