Anthropic said the US Commerce Department has lifted export controls on Claude Fable 5 and Mythos 5, clearing the way for both models to come back online tomorrow. The two flagship models had been unavailable for 18 days, according to the source material.
In a post on its official X account, Anthropic said it had been notified that the restrictions were removed and that access would begin to return starting the next day. The company added that more updates would be shared soon and thanked users for their patience during the outage, along with the teams involved in redeploying the models.
BIS order had blocked access for “any foreign person”
The source says that on June 12, 2026, the Bureau of Industry and Security, part of the US Commerce Department, ordered Anthropic to suspend access to Claude Fable 5 and Mythos 5 for “any foreign person,” citing national security concerns. It was described as the first time the department had imposed export controls on a domestic frontier AI model.
The practical effect was broad. Even users located inside the United States could be denied access if BIS determined there was uncertainty around foreign status. Anthropic was reportedly unable to screen accounts by nationality with enough reliability, so it shut down both models entirely.
Two security concerns were cited
The report points to two parallel concerns behind the order. One involved warnings from partners including Amazon that the models faced jailbreak risks. The other was a report that Mythos 5 had been released to a South Korean telecom company with ties to China.
The source also notes that this was the first time an AI model was treated like an advanced chip under export-control logic. With the restriction now removed, Anthropic is preparing to restore access to its key models, ending a shutdown that lasted just over two weeks.