US Government Ban on Anthropic’s Fable 5 Triggers Shift to Open-Weight AI Models

Following a surprise U.S. government directive ordering Anthropic to suspend its newly released Claude Fable 5 and Mythos 5 models for all foreign nationals, the company was forced to shut down global access to compliance. The Commerce Department issued the sweeping order over national security concerns regarding a narrow "jailbreak" capability involving code-vulnerability fixes.