A U.S. legal technology company on Tuesday sued the federal government, challenging ​a directive by U.S. President Donald Trump’s administration that resulted in the ‌artificial intelligence firm Anthropic halting access to two ​of its most advanced models for ⁠users worldwide.

Legion LegalTech Corp filed its lawsuit in Washington, D.C., federal court, saying a June 12 order by the U.S. ‌Commerce Department’s Bureau of Industry and Security unlawfully required Anthropic to disable its Fable 5 and ‌Mythos 5 models for “any foreign national.”

Anthropic turned ‌off ⁠access for all customers the same day to ⁠ensure compliance.

San Jose, California-based Legion says it depends on Anthropic’s tools for its software platform and that the U.S. government’s action immediately ​cut off access for ‌members of its Canada-based software development team and disrupted its business. The company builds drafting and case-management tools for attorneys.

“The harm to Legion is immediate, irreparable, and existential,” ‌the lawsuit said. “The pace of frontier AI advancement ​is blistering, and competitive ground lost during a suspension cannot be regained after the fact.”

The ⁠Commerce Department and White House did not immediately respond to requests for comment. Anthropic is not a party ‌to the litigation.

Anthropic on Tuesday referred to a prior statement that said it was “grateful to the administration for their ongoing partnership in working to get this matter resolved as quickly as possible.”

Legion asked a U.S. judge to vacate and set aside the administration’s directive targeting ‌Anthropic. The company also said it would ask for a preliminary ​order to bar the administration from enforcing the directive. Anthropic and the United States are locked ⁠in legal battles in Washington and California federal courts. ⁠

Anthropic sued the Trump administration after the government moved to place the company on a supply-chain blacklist ‌over its refusal to allow the military to use its AI models for domestic surveillance or fully ​autonomous weapons.