On June 12, 2026, the U.S. government barred foreign nationals from accessing Anthropic's latest AI models, Fable 5 and...

On June 12, 2026, the U.S. government barred foreign nationals from accessing Anthropic's latest AI models, Fable 5 and Mythos 5, citing national security risks. Anthropic responded by disabling the models globally, as it could not enforce nationality-based restrictions without a full shutdown Tom's Hardware. The ban followed a red-team test where Mythos reportedly breached NSA classified systems in hours, though Anthropic disputes the severity, calling it a narrow jailbreak CNBC. Critics, including Yann LeCun, argue that Anthropic's own risk warnings helped trigger the crackdown Ars Technica. This is the first time the U.S. has applied export controls directly to an AI model rather than hardware, signaling a new regulatory front. The ban has boosted open-source alternatives, with Sakana AI launching Fugu as a direct competitor VentureBeat. Despite the setback, Anthropic continues to hire aggressively for global roles and signed a compute deal with Micron Digitimes. However, the export restriction represents a material downside risk, limiting market access and potentially driving customers to rivals.