Anthropic seeks removal of export curbs on Fable 5, Mythos 5

Anthropic flew senior technical staff to Washington this weekend after a Friday order barred foreign access to its largest models, Fable 5 and Mythos 5. The company disabled access for non-U.S. users days after the models launched.

Company technical teams held virtual meetings with White House staff in the days following the order, and senior engineers and executives traveled to Washington for in-person discussions over the weekend.

Anthropic participants included co-founder and chief compute officer Tom Brown and policy chief Sarah Heck, according to a person close to the company. White House participants included Commerce Secretary Howard Lutnick and White House cyber director Sean Cairncross.

Both parties want the models returned to service for international users, but officials have not agreed on the technical or policy steps required. Some U.S. officials have proposed pairing Anthropic engineers with government security researchers to address national security concerns while widening access. Details of any proposed fixes or the scope of required safeguards were not disclosed.

The timeline for a resolution remains unclear and discussions are ongoing. Anthropic continues to work with officials to identify a path that would allow Fable 5 and Mythos 5 to come back online for foreign users while addressing security concerns.

The dispute could affect Anthropic’s financial plans. The company has filed a confidential S-1 with the Securities and Exchange Commission, preserving the option of an initial public offering. A prolonged standoff with regulators or further restrictions could shape investor views of that potential listing.

Representatives for Anthropic and the White House were contacted for comment.