Order cutting access to Anthropic's AI models sparks criticism

The US government ordered Anthropic to suspend its most powerful AI models, Mythos 5 and Fable 5, for national security reasons, a move Anthropic disclosed on a Friday evening without further detail. Mythos 5 was available to a limited set of partners and unrestricted, while Fable 5 was heavily safeguarded to curb misuse such as cyberattacks or chemical and biological weapon development. Anthropic attributed the directive to a third party, reportedly Amazon, which claimed a bypass around safeguards; the company described the vulnerability as narrow with minor impact. The order applied only to foreign nationals, and Anthropic said it could not distinguish users by nationality, prompting unprecedented government action in this sector.