On June 12, 2026, at precisely 5:21 PM local time, AI firm Anthropic was notified via an urgent communication from the U.S. government. This directive, rooted in national security mandates, enforced an export control measure that necessitated the immediate cessation of access to Anthropic's cutting-edge AI models—Claude Fable 5 and Mythos 5—for all non-U.S. citizens, irrespective of their geographical location. This encompassed even Anthropic's own international staff members. Consequently, Anthropic had no recourse but to deactivate these models for users worldwide.

Anthropic has clarified that the U.S. government's rationale, conveyed through verbal assertions, centered on a specific, non-generic, and narrowly defined method of circumventing security measures (a form of "jailbreaking"). The company firmly believes that this decision is predicated on a profound misapprehension. Anthropic has raised an alarm, cautioning that if such a precedent were to be adopted industry-wide, it would effectively bring the rollout of innovative models by all front-running AI enterprises to a grinding halt.

Presently, Anthropic is engaged in proactive dialogue with U.S. governmental bodies, striving to expedite the reinstatement of access to the impacted models at the earliest opportunity.