Fable 5 refusals are 200 OK — your error handler misses them
Anthropic has globally suspended its Fable 5 and Mythos 5 models following a U.S. export-control directive issued in mid-June 2026. The directive, citing national security concerns, required Anthropic to block access for foreign nationals, leading the company to disable the models for all users worldwide due to an inability to differentiate in real-time. While Anthropic disputes the directive's risk characterization and process, there is no confirmed restoration date for Fable 5 or Mythos 5, though Opus 4.8, Sonnet, and Haiku remain unaffected and available. AI
IMPACT Global availability of advanced AI models is restricted by export controls, impacting development and deployment.