The US government has ordered Anthropic to block access to its AI models Fable 5 and Mythos 5, citing concerns that they could be used in cyberattacks. The move was made after conversations between Amazon and the White House about researchers finding ways to exploit the models. Anthropic has complied with the directive, but disagrees that the models should be recalled. The incident highlights the power of the US government over critical technologies and raises concerns about relying on the US for AI.