Stay up to date with notifications from The IndependentNotifications can be managed in browser preferences.Jump to contentThank you for registeringPlease refresh the page or navigate to another page on the site to be automatically logged inPlease refresh your browser to be logged inAllNewsSportCultureLifestyleThe logo of Anthropic's AI model Claude Mythos displayed on a smartphone's screen in Brussels on 10 June, 2026 (AFP/Getty)U.S. officials initially blocked Anthropic's advanced AI models, Fable and Mythos, citing national security risks due to their potential to identify critical infrastructure vulnerabilities. An export ban was imposed, which Anthropic found difficult to enforce, leading to negotiations with the US Commerce Department. The ban has since been lifted, with Anthropic implementing enhanced safeguards and collaborating with the US government to make its models available. Mythos 5 is now accessible to "trusted" US organizations, while Fable 5, designed for the general public with stronger protections, is set for wider release. Anthropic acknowledges the challenge of fully preventing AI "jailbreaks" and continues to work with government and industry partners to develop shared safety standards. In fullAnthropic Mythos: AI system so ‘dangerous’ it was banned is returningThank you for registeringPlease refresh the page or navigate to another page on the site to be automatically logged inPlease refresh your browser to be logged in