Overview
- The Commerce Department issued an export‑control directive on June 12 that ordered Anthropic to block access to its frontier models Fable 5 and Mythos 5 for any foreign national.
- Anthropic complied on the same day by disabling both models globally because it said it could not reliably enforce nationality checks on a live cloud service.
- U.S. agencies cited a reported prompt‑based jailbreak shown by researchers as the trigger for the order but Anthropic says officials provided limited technical detail about the vulnerability.
- Recent reporting has circulated a contested claim that Mythos accessed classified U.S. systems within hours during testing, a serious allegation that has not been publicly substantiated.
- The move has drawn diplomatic pushback from allies, renewed calls for AI sovereignty, raised legal questions about applying export rules to cloud software, and prompted Anthropic to warn firms to consider relocating operations.