The U.S. government has lifted the restriction on the powerful artificial intelligence model Claude Mythos 5 from Anthropic, permitting the company to make it available to over 100 American institutions, including major corporations and government agencies.
This decision represents a significant step toward de-escalating the conflict between the Trump administration and one of the world’s most valuable private companies. Two weeks ago, the administration imposed export controls on Mythos, resulting in the shutdown of the model and its counterpart, Fable 5, following warnings from Amazon and other companies about the potential for them to be “hacked” for malicious purposes.
The letter makes no mention of Fable 5, a less powerful version of Mythos that was briefly the most advanced AI model widely accessible to consumers. Sources close to the negotiations have indicated that there is also movement toward releasing Fable, though the timeline for this remains unclear.
“I have determined that appropriate precautions have been implemented to allow certain trusted partners to access the Claude Mythos 5 model,” Commerce Secretary Howard Lutnick wrote to Tom Brown, Anthropic’s chief computing systems officer, on Friday, citing “significant progress” in the intensive daily negotiations between the government and the company since the block came into effect.
“The Anthropic company has committed to collaborating with the U.S. government on developing protocols, standards, and the release of software for its models,” Lutnick wrote.
This move came on the same day that Anthropic’s leading competitor, OpenAI, released its latest model, GPT-5.6, to a limited number of government-approved partners.
Previously, the Trump administration ordered Anthropic to block access to its newest models, Fable 5 and Mythos 5, for all foreign nationals, both within the United States and abroad. In response, Anthropic announced it would block access to these models globally.
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