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Welp, it was nice while it lasted. Anthropic said Friday that it will “immediately suspend” access to its latest Mythos 5 and Fable 5 AI models under orders from the U.S. government. Access to other models is not affected, and the company said it's working to "restore access as soon as possible."A directive from the White House issued at 5:21 p.m. ET on Friday required the company to revoke access to its next-gen models for "any foreign national, whether inside or outside the United States, including foreign national Anthropic employees," Anthropic explained in a blog post. With no way of applying that rule at the moment, Anthropic abruptly disabled the models for all of its customers to ensure compliance.The unexpected move comes just days after Anthropic unveiled Fable 5 and Mythos 5, touting them as cutting-edge AI models that set new performance standards across a range of industry benchmarks. Fable 5 is especially notable because it marks the first time Anthropic released such an advanced model to the public, owing to new safety measures designed to block responses in certain high-risk areas that the company developing working closely with authorities in the US and the UK. Fable's safeguards are "substantially more effective than those of any previously deployed model" according to the company.A matter of national security?