Senior Anthropic technical staff have been dispatched to Washington DC, after a Friday night government demand to implement sweeping export controls resulted in the company yanking its two most capable models Friday night after only a few days of public release - Mythos and Fable (Fable being Mythos with guardrails) - over the alleged ability to 'jailbreak' the latter. As of Sunday the models are still down, no restoration date has been set, but sources on both sides told Axios they are eager to resolve it. That said, the two parties best positioned to explain what happened are telling different stories as to how this happened. Anthropic CEO Dario AmodeiThe order is narrow on paper and sweeping in effect. It prohibits access by "any foreign national, whether inside or outside the United States, including foreign national Anthropic employees." Anthropic has no reliable way to verify a user's citizenship at the moment they send an API request or open a chat window, and its own staff, customers, and cloud partners are spread across dozens of countries. The company concluded it could not selectively block foreign nationals, so it blocked everyone. Anthropic's other models, including Opus 4.8, Sonnet, and Haiku, are untouched and still running.The US government, citing national security authorities, has issued an export control directive to suspend all access to Fable 5 and Mythos 5 by any foreign national, whether inside or outside the United States, including foreign national Anthropic employees.