Anthropic's lawsuit also names other federal agencies, including the departments of Treasury and State, after officials ordered employees to stop using Anthropic's services.
Even as it fights the Pentagon's actions, Anthropic has sought to convince businesses and other government agencies that the Trump administration's penalty is a narrow one that only affects military contractors when they are using Claude in work for the Department of Defense.
Making that distinction clear is crucial for the privately held Anthropic because most of its projected $14 billion in revenue this year comes from businesses and government agencies that are using Claude for computer coding and other tasks. More than 500 customers are paying Anthropic at least $1 million annually for Claude, according to a recent investment announcement valued the company at $380 billion.
Anthropic said in a statement Monday that "seeking judicial review does not change our longstanding commitment to harnessing AI to protect our national security, but this is a necessary step to protect our business, our customers, and our partners."