pentagon-6ef25a2b·1 events·first seen Aliases: Pentagon
Anthropic's Claude Fable 5 and Mythos 5 were suspended globally on June 12 following a U.S. Department of Commerce export control directive triggered by Amazon researchers demonstrating cyberattack capability extraction from Fable 5. After three weeks of negotiations, Anthropic implemented additional cybersecurity guardrails and restored access on July 1, with some users reporting degraded performance and over-censorship of legitimate queries. The episode marks the first time a government intervention led to the suspension of general public access to a frontier AI model, and sets a precedent for government review of top-tier model releases. OpenAI's GPT-5.6 family launches were also preceded by a government-mandated capability preview, suggesting an emerging pattern of regulatory scrutiny before wide deployment.