Anthropic’s Claude Fable 5 and Mythos 5 Launch
🛡️ Anthropic released Claude Fable 5 publicly on June 9, pairing it with a twin, Claude Mythos 5, that retains strong cybersecurity capabilities for vetted defenders. Fable 5 routes flagged cyber, bio, chemistry, and distillation requests to the weaker Opus 4.8 using safety classifiers, while Mythos 5 keeps those abilities available under trusted access. Both models are priced per input/output tokens and included on paid plans through June 22 before moving to usage credits.
