Anthropic announced that the US Department of Commerce has lifted restrictions on its most powerful AI models, Claude Fable 5 and Mythos 5.
"We are grateful to our users for their patience and thank everyone who worked with us to redistribute the models," the company said in a statement.
In a letter from US Commerce Secretary Howard Lutnick to Anthropic that circulated online, it said the company no longer needs an export license because it has agreed to "proactively identify and address" security risks related to the models, work with the government on standards for future models, and report "malicious activities" to the government.
Last month, Anthropic suddenly shut down Claude Fable 5 and Mythos 5 after the Trump administration ordered it to restrict access to all foreign nationals, including foreign employees.
The company said at the time that the government did not provide a specific reason beyond national security concerns, but it believed officials were worried about security vulnerabilities in Fable 5.
Last Friday, the San Francisco-based company announced it had received approval to provide the models to US organizations that "operate and defend critical infrastructure."
The restrictions were the latest example of the strained relationship between the Trump administration and Anthropic. In March, Anthropic sued the US Department of Defense after the Pentagon labeled the company a "supply chain risk."
Francesco Bailo, deputy director of the University of Sydney's Center for AI, Trust and Governance, told Al Jazeera that the lifting of restrictions was expected in tech circles. Bailo said reports that researchers were able to "jailbreak" Fable 5 were highly exaggerated. "The US government probably realized it overreacted and understood that this decision would set a dangerous and messy precedent for regulation and would draw a strong response from an industry that has invested heavily in maintaining close communication with the Trump administration," he said. "If Fable and Mythos were blocked on these grounds, it was clear that rival models would have to be blocked as well," Bailo added.
Tanishq Abraham, former research director at Stability AI and now head of medical AI company Sophont, called the Trump administration's latest move a "major development" and said it raises important questions about the industry's regulation. "From the outside, it looks like the troubled relationship between Anthropic and the US government is improving, and that is likely thanks to Tom Brown's efforts," Abraham told Al Jazeera. "Now the big question is: What kind of precedent does this set for the industry? Does the US government need to approve every leading model release? We already saw that starting with the GPT-5.6 release. There are many unanswered questions about how leading labs should interact with the US government," he said.