Legal tech firm sues US over Anthropic access curbs

TL;DR:

  • Legion LegalTech is suing the US government over a 12 June order that forced Anthropic to disable its Fable 5 and Mythos 5 models for “any foreign national”.
  • The firm says the cut-off immediately disrupted its Canada-based development team and calls the harm “immediate, irreparable, and existential”.
  • It wants a court to vacate the directive; Anthropic is not a party to the suit.

A US legal technology company has taken the federal government to court over the directive that pushed Anthropic to suspend worldwide access to its two most advanced models. Legion LegalTech Corp filed in Washington, D.C., federal court, arguing that a 12 June order from the 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 switched off access for all customers the same day to ensure compliance.

”Existential” disruption

San Jose-based Legion, which builds drafting and case-management tools for lawyers, says the order immediately cut off its Canada-based software development team and disrupted its business. “The harm to Legion is immediate, irreparable, and existential,” the lawsuit states. “The pace of frontier AI advancement is blistering, and competitive ground lost during a suspension cannot be regained after the fact.” The company has asked a judge to vacate the directive and signalled it will seek a preliminary order blocking enforcement.

The case is the latest front in a sprawling dispute. Anthropic — itself preparing for an IPO — is already locked in legal battles with the government in Washington and California after being placed on a supply-chain blacklist over its refusal to allow military surveillance and autonomous-weapons use. The access curbs have rippled well beyond US borders, prompting European firms to spread their AI bets across multiple providers rather than depend on services that can be switched off.

Looking forward

For UK businesses, Legion’s predicament is the clearest illustration yet of a sovereignty risk that can feel abstract until it bites: a remote proprietary model can be revoked overnight by a foreign government, stranding the products built on top of it. Whether a US court will second-guess a national-security export order is uncertain, but the lawsuit puts a number on the cost of dependence. It strengthens the case — already gathering pace in Whitehall — for open-weight models that organisations can run on their own infrastructure.

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