Anthropic Blocks Foreigners From Using Mythos and Fable AI NYT - Top Stories By: Cade Metz and Dustin Volz 13 June 2026 at 04:48 The company said on Friday night that the federal government had ordered limits on its Mythos and Fable 5 A.I. systems, citing national security concerns. © Nicolas Tucat/Agence France-Presse — Getty ImagesAnthropic’s Mythos A.I. model has raised worries that it could be used to attack computer networks.