The Trump administration has ordered Anthropic to shut down access to its newest AI models for all foreign users, marking an unprecedented use of export controls on AI services and leaving the company and industry uncertain about what compliance actually means.

What happened: The Trump administration abruptly ordered Anthropic to cut access to its Fable 5 and Mythos 5 models for all foreign nationals, including users inside the US and the company's own employees. The government cited 'national security authorities' and an 'export control directive' to justify the order, and Anthropic has been forced to block access entirely. The government has not publicly explained the legal basis for the order.

Why it matters: This marks the first time US export controls have been used to control access to an AI model in this way, according to a senior research analyst at Georgetown University's Center for Security and Emerging Technology. Export controls have traditionally applied to physical goods or discrete digital items like source code or model weights—not to remote services accessed through a chatbot. Experts say the move exposes an uncertain and unstable stage in AI governance and leaves companies unsure what the government actually expects of them when they build new models.

What to watch: If Anthropic was targeted because its models are uniquely capable, the order raises obvious questions for the next generation of models from OpenAI, Google, Meta, xAI, and other frontier labs. Experts warn that ad hoc interventions without clear public explanation are unsustainable and risk pushing the US behind in the global AI race, especially if other countries become wary of relying on American firms for access to strategically important systems.