Statement on the US government directive to suspend access to Fable 5 and Mythos 5

In three linesUS government ordered Anthropic to suspend access to Fable 5 and Mythos 5 for all users citing national security concerns. The directive cites risk of a 'jailbreak' method bypassing model safeguards. Anthropic disputes this: identified vulnerabilities are minor and available on other public models including OpenAI's GPT-5.5.

Summary generated by Claude — human-verified