Anthropic Redeploys Claude Fable 5 on July 1 After U.S. Lifts Export Controls, Adds >99%-Effective Cyber Classifier

Anthropic·high signal

Anthropic redeployed Claude Fable 5 starting July 1 after the U.S. government lifted the June 12 export-control order that had pulled Fable 5 and Mythos 5 offline for nearly three weeks. The order followed an Amazon report showing Fable 5's safeguards could be bypassed to surface software vulnerabilities; Anthropic trained a new safety classifier that blocks that specific technique in over 99% of cases. Fable 5 is included for up to 50% of weekly usage limits for Pro/Max/Team/select Enterprise through July 7, and Anthropic is co-drafting an industry jailbreak-scoring standard with Amazon, Microsoft, and Google. This materially updates the June 26 'Fable 5 is back rumors debunked' story — it is now officially back.