The United States lifted its export controls on Anthropic’s advanced Mythos and Fable artificial intelligence models after the company added more safeguards to the system.
The U.S. had implemented a ban on the use of the two hyper-advanced AI models on June 12, resulting in the company pulling the models’ availability from everyone else. Commerce Secretary Howard Lutnick rescinded the bans on Tuesday, and Anthropic said access to the models would be restored on Wednesday.
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“We’ve received notice that the Department of Commerce has lifted export controls on Claude Fable 5 and Mythos 5. We’ll begin restoring access tomorrow, and will share an update soon,” Anthropic said in a post on X, thanking users.
The company provided extensive details of the products’ release timeline and negotiations, saying the models were being redeployed after “a series of productive conversations with the U.S. government.” The models would have a “new set of classifiers to target and block more cybersecurity tasks.”
Some coding and debugging tasks would fall back to the older model Opus 4.8 in the ensuing weeks, Anthropic said, as the company continues refining the new classifiers.
Looking to preempt further incidents, Anthropic said it had begun “drafting a consensus framework” for “assessing the severity of AI jailbreaks and how AI developers should respond to them.” The company said Microsoft, Google, other Glasswing partners, and Amazon will participate in the effort. A complaint from Amazon AI researchers about the advanced Anthropic models triggered the original export ban.
“A shared standard for judging the severity of a given jailbreak would help AI developers triage new findings as they arise, launch highly capable models with greater safety, and communicate the level of risk consistently to government and industry partners,” the company said.
It also stressed it was “scaling up our collaboration with the US government on model testing and safeguards.”
Lutnick issued a brief statement of his own, stressing the U.S.’s leadership in AI development.
“Over the past two weeks, we have worked closely with Anthropic to analyze and approve Fable 5 to ensure alignment across the US Government and strengthen America’s leadership in AI,” he said in a post on X.
ANTHROPIC BLOCKS MOST ADVANCED AI MODELS AFTER US BARS FOREIGN USE
Anthropic released its Fable 5 and Mythos 5 models earlier in June, advertising them as the most advanced AI models released to the public to date. The company received a directive from the U.S. government banning any foreign national from using the models, citing concerns over an alleged method to “jailbreak,” or bypass, the models’ security features. To comply with the demand, Anthropic suspended use of its models for all users, claiming that the move was the only way to cooperate with the order.
The ban was just the latest feud between the U.S. government and Anthropic. They have clashed repeatedly over the government’s authority over AI companies, particularly in the military realm. Earlier this year, Anthropic had a high-profile standoff with the Pentagon as the Department of War labeled the company a supply chain risk because Anthropic had objected to the military having unrestricted use of its AI models.
