Anthropic disables new models after government calls them a national security concern

The U.S. Commerce Department ordered Anthropic to suspend foreign access to its most advanced models, Fable 5 and Mythos 5, citing a reported technique that can circumvent safety restrictions (a "narrow, non-universal jailbreak"). Anthropic disabled the models to comply, disputed the seriousness of the finding, and noted similar capabilities exist in other public models; the action has drawn debate over export controls, national security, and implications for AI deployment.