The US government restricts access to Anthropic’s newest and most powerful “frontier” AI models, citing national security concerns. Multiple outlets report that, following a US export control directive earlier in the month, Anthropic suspends access to those models for foreign nationals and non-US employees, affecting international partners. The directive also points to worries that the models’ safeguards could potentially be bypassed. Anthropic complies by taking down or disabling the models and describes the government order as not providing a clear explanation for the national security rationale.

In subsequent updates, Anthropic says it restores global access to most of its advanced models after the US government lifts the export restrictions that had been imposed earlier. Outlets frame the episode as a reversal from the initial freeze and note that the company works with Washington to strengthen safeguards around the technology. International reactions include criticism and debate about whether the restrictions are discriminatory and broader concerns about the strain on alliances. Overall, the reporting highlights the growing role of advanced AI in geopolitical and export-control policy.