Anthropic launched Claude Fable 5, its first public Mythos-class model, with benchmark gains over Opus but strict safety blocks. iOS code points to model fallback, voice model switching, and Claude Code support for managed agents.
Additionally, Claude Mythos 5, a separate model version with enhanced safeguards, has been released to a small group of cyber defenders and infrastructure providers.
ANTHROPIC π₯: Claude Mythos is planned to be released as Claude Fable 5 according to checkpoints detected by Dev Mode, Hacker News reports and Sources.
Anthropic is also hosting its 3rd developer event in Japan tomorrow.