model-takedown

Anthropic is redeploying Claude Fable 5 after a month-long government-mandated takedown triggered by Amazon researchers discovering a method to bypass the model's cybersecurity safeguards. The returning version includes enhanced safety classifiers that automatically block cybersecurity tasks and revert to Opus 4.8, with restricted availability through usage credits only.

Anthropic's Fable 5 AI model was pulled from public access Friday night after Amazon reported security vulnerabilities to the White House. The administration imposed export controls on Anthropic's Mythos-class models just days after the June 9 release.