The Commerce Department lifted restrictions on all of Anthropic’s artificial intelligence models on Tuesday, allowing the company to bring its most powerful A.I. technologies back online, according to a letter from the government to the company that was viewed by The New York Times.
In the letter, Commerce Secretary Howard Lutnick told Anthropic that it would no longer need a license for exports or in-country transfers of its Claude Mythos and Claude Fable A.I. models, reversing an order issued on June 12.
“Anthropic has taken steps in close coordination with the U.S. government to address the risks associated with Claude Mythos 5 and Claude Fable 5,” Mr. Lutnick wrote.
The move was the latest chapter in Anthropic’s often prickly relationship with the federal government and is set to de-escalate their feud, paving the way for the company to largely return to business as usual. Citing national security, the Commerce Department had initially ordered Anthropic to suspend access to its latest A.I. models for all foreign nationals.
Those controls raised questions about how hands-on the Trump administration might be with the fast-growing artificial intelligence industry. They also could have caused significant problems for technology development at Anthropic, which along with OpenAI is among the world’s most influential A.I. companies. Mythos and Fable, which are powerful at identifying security flaws in software, are considered a significant improvement on earlier A.I. models.
The restrictions were the second time the Trump administration had targeted Anthropic, which is based in San Francisco. In March, after tense talks over how Anthropic’s A.I. could be used in warfare, the Pentagon labeled Anthropic an unacceptable supply chain risk, potentially limiting its use by federal agencies. Anthropic has sued the federal government over that designation.
Mr. Lutnick lifted the export controls after weeks of deliberations between the Commerce Department and the company over safeguards built into its A.I. models. Last week, he announced a partial deal with Anthropic to bring back access to its Mythos model for some clients.
In Tuesday’s letter, Mr. Lutnick said Anthropic had agreed to take steps including proactively detecting and addressing security risks for the A.I. models, working with the U.S. government on protocols and standards for these and future models, and informing the government of any malicious activity.
Mr. Lutnick added that the Commerce Department “reserves the right to re-evaluate the decisions made in this letter” if Anthropic fails to adhere to its commitments or circumstances change.
In a statement posted on social media, Anthropic said it would begin restoring access to its A.I. models on Wednesday.
“We’re grateful to our users for their patience, and to everyone who worked with us on redeploying the models,” the company said.
President Trump previously took a hands-off approach to the A.I. industry, arguing that it needed to grow unfettered for the United States to compete with China. But this month, he signed an executive order that asked tech companies to voluntarily give the government oversight of new A.I. models before releasing them to the public, in his biggest step toward regulating the technology.
Since then, the Trump administration has moved to regulate other Silicon Valley A.I. companies apart from Anthropic.
When OpenAI unveiled an A.I. technology called GPT-5.6 Sol this month, it said it would share the technology only with some companies approved by the administration. Meta, the only major U.S. developer of A.I. that has not reached an agreement to voluntarily share its models with the federal government for review, was pressed by the administration last week to begin submitting its models.
(The Times has sued OpenAI and Microsoft, claiming copyright infringement of news content related to A.I. systems. The two companies have denied those claims.)
Trump officials are still working on a framework for how companies should formally submit new A.I. models for review, and what standards they would be held to, two people familiar with the discussions said.
In a social media post on Tuesday, Susie Wiles, the White House chief of staff, expressed her “gratitude to companies across industries who continue to work closely with the White House” to carry out Mr. Trump’s executive order on A.I.
“Our shared priority remains: get the best tech deployed as quickly and safely as possible,” she said.
