Anthropic disables Fable 5 and Mythos 5 after US Commerce Department export control directive

Anthropic abruptly shut off access to its newly launched Mythos 5 and Fable 5 models Friday night after receiving a US Commerce Department directive subjecting them to export controls. The company stated that immediate compliance required disabling the models for all customers, while other Anthropic models remain unaffected. According to an Axios report, the administration cited concerns about a jailbreak that bypasses classifier-based safeguards on cybersecurity, chemistry, and biology topics, and requested a pause to harden the national security apparatus, a process expected to take a few weeks.