Anthropic cuts off Fable 5 and Mythos 5 access following government order

Anthropic blocked access to Fable 5 and Mythos 5 due to a government order citing national security concerns. The order affects all foreign nations and Anthropic employees. The company claims the government didn't provide specific details on the concerns. Customers are currently unable to access the models. The government allegedly mentioned minor vulnerabilities that can be found in other models.