US export ban paused Anthropic for 18 days — and now frontier models are back

anthropic restored access to its frontier fable and mythos models and launched claude sonnet 5, ending an 18-day suspension forced by a us government export control directive. the pause, effective since june 12, directly linked advanced model availability to federal compliance mechanisms, impacting developers relying on anthropic's highest-tier systems. this incident sets a precedent for how geopolitical regulations can abruptly disrupt ai service continuity, suggesting tighter checks ahead for flagship model releases.