Claude Fable 5 Is Back: Redeploy, a Tighter Cyber Classifier, and an Industry Jailbreak Framework
US export controls on Claude Fable 5 and Mythos 5 have been lifted; Fable 5 returns July 1 with a tighter cyber classifier (more false positives, Opus 4.8 fallback), a new industry jailbreak-severity framework, and deeper US government collaboration.