Anthropic Blocks Foreign Access To Fable 5, Mythos 5 After U.S. National Security Order About four days after Anthropic released Claude Fable 5, a next-generation "Mythos-class" AI model, the frontier AI lab led by Dario Amodei revealed late Friday that it was disabling foreign customers' access to these cutting-edge models, citing an export-control directive from the federal government. "The US government, citing national security authorities, has issued an export control direc...