Federal regulators have ordered Anthropic to immediately suspend access to its Fable 5 and Mythos 5 artificial intelligence models for all foreign nationals. The export control directive, issued June 12, 2026, came just 72 hours after the products launched, marking one of the fastest regulatory interventions in recent AI history.
Officials cited a specific jailbreak vulnerability that could expose critical infrastructure security weaknesses. The mandate is sweeping, barring access even to Anthropic’s own international employees. Anthropic complied with the order but publicly disputed the severity of the flaw, warning that such aggressive government action threatens broader industry innovation.
Financial markets reacted swiftly to the regulatory clampdown. Anthropic’s pre-IPO shares declined sharply following the suspension announcement. The company had originally positioned Mythos as a defensive cybersecurity tool under Project Glasswing before expanding its commercial availability earlier this year.