U.S. Lifts Restrictions on Anthropic’s Claude Mythos 5 AI Model

The U.S. government has authorized Anthropic to make its advanced Claude Mythos 5 artificial intelligence model available to a select group of trusted domestic partners, marking a partial reversal of a prior two‑week suspension imposed over national‑security concerns.

More than 100 firms and institutions will now gain access to Mythos 5, including numerous Fortune 500 enterprises, according to a source familiar with the directive who requested anonymity given the matter’s sensitivity.

Concerns that advanced AI systems might be exploited by military intelligence agencies in China, Russia, and other strategic competitors have prompted the Trump administration to adopt a stringent oversight regime for the deployment of Anthropic’s and rival OpenAI’s frontier models.

Earlier on Friday, OpenAI announced that, at the U.S. government’s request, it is postponing the full public release of GPT‑5.6 and will instead restrict access to a limited set of vetted partners whose identities have been disclosed to authorities.

Anthropic had temporarily disabled its most advanced AI models — Mythos 5 and Fable 5 — for all users following the government’s June 12 export‑control directive.

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