The U.S. government has ordered Anthropic to immediately suspend access for all foreign nationals to its Fable 5 and Mythos 5 artificial intelligence models, citing undisclosed national security concerns, the AI company announced on Friday.
Government Directive
Anthropic stated that it received the export control directive on Friday from the government, which did not provide specific details regarding its national security concern. However, the company believes the government has become aware of a method to bypass, or 'jailbreak,' the Fable 5 model, according to Anthropic's statement.
Impact on Services
'The net effect of this order is that we must abruptly disable Fable 5 and Mythos 5 for all our customers to ensure compliance. Access to all other Anthropic models will not be affected,' the company said. Anthropic added that it believes there was a 'misunderstanding' and is working to restore access to the models as soon as possible.
Broader Context
This action is part of a series of regulatory measures by the Trump administration targeting artificial intelligence technologies over national security risks. Anthropic, a leading AI research firm, has been cooperating with authorities while seeking clarity on the specific concerns.



