Trump administration blocks Anthropic Mythos 5 and Fable 5 models over jailbreak concerns

According to TechCrunch and The Verge, the Trump administration ordered Anthropic to cut access to its Mythos 5 and Fable 5 models for all foreign nationals following an Amazon report about bypassed safety guardrails. The National Security Agency concluded that guardrails could be disabled on Fable 5, which restricts access to capabilities related to cybersecurity, chemistry, and biology. White House officials demanded Anthropic take steps to address what they view as vulnerabilities, though Anthropic has stated the jailbreak effects are minimal and similar bypasses exist in models from competing vendors.