U.S. government orders Anthropic to block foreign access to Fable 5 and Mythos 5 models

According to TechCrunch and The Verge, the Trump administration ordered Anthropic to pull Fable 5 and Mythos 5 models from service and block foreign access, citing national security concerns. The move followed alleged findings by Amazon researchers of a method to bypass Fable 5's guardrails. The sources do not specify when Anthropic complied or the scope of affected deployments.