US government orders Anthropic to block Claude Fable 5 and Mythos 5 globally over national security concerns
By
Carl Franzen
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Summary
The US government issued an unprecedented export control directive ordering Anthropic to immediately suspend access to its Claude Fable 5 and Claude Mythos 5 models for foreign nationals, citing national security authorities. In response, Anthropic blocked all public access to both models globally — affecting even paying enterprise customers and internal employees. This reversal comes just three days after the public release of these models. The article argues enterprises can no longer rely on any single AI model or provider for critical workflows due to operational reliability risks.
Key quotes
· 4 pulledThe US government last night issued an unprecedented export control directive ordering Anthropic to immediately suspend all access to its top-tier Claude Fable 5 and Claude Mythos 5 models for foreign nationals, citing unspecified national security authorities.
Anthropic has blocked all public access to both models, globally — meaning no users around the world can access them at this time, even paying enterprise customers and Anthropic employees internally.
It's a huge blow and reversal following the public release of Fable/Mythos 5 just three days prior.
Enterprises can no longer afford — from an operational reliability standpoint — to run critical workflows on any single AI model or even provider.
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