Fable and Mythos 5.2: The System Card

thezvi.substack.com32 min read

An evaluation of Anthropic's Claude Mythos 5.2 system card reviews the model's capabilities, safeguards, and alignment risks. The author argues that Anthropic met its internal RSP threshold for AI R&D acceleration despite official reluctance and examines performance metrics across biology, cybersecurity, and agentic safety. Open article →