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Editorial cover for the Claude Fable 5 release with a large Fable 5 title and Mythos goes public subtitle
AI News
#12

Claude Fable 5 Is Out: Anthropic Opens Up the Mythos That 'Spooked the Government,' With a Gate in Front

On June 9, Anthropic released Claude Fable 5, the first Mythos-class model available to the public. It shares its underlying model with the restricted Mythos 5; the difference is Fable 5's classifier gate, which reroutes high-risk requests in cybersecurity and bio-chem to Opus 4.8. Pricing is double Opus 4.8. Here's the capability, the limits, and the controversy.

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