Overview
- Citing reported security bypasses, Commerce Secretary Howard Lutnick ordered an abrupt restriction of Anthropic’s Claude Mythos 5 and Fable 5 on June 12.
- After two weeks of technical work with U.S. agencies, Lutnick on June 27 conditionally reauthorized Mythos 5 for more than 100 vetted U.S. government agencies and companies.
- Fable 5, the consumer-targeted variant, remains blocked and was not included in the conditional restart.
- Anthropic and federal officials say they fixed vulnerabilities that had allowed safeguards to be bypassed, a process that included addressing issues flagged by Amazon and other security researchers.
- The move is already changing industry practice by prompting client-by-client rollouts at rivals such as OpenAI and raising questions about reliance on U.S. providers versus open or non-U.S. models.