Sony, Warner sue Anthropic, alleging "blatant theft" of intellectual property

Driving the news: Units of Sony Music and Warner Music filed the suit in federal court in northern California late Friday night, naming Anthropic, CEO Dario Amodei and co-founder Benjamin Mann as defendants.

What they're saying: "Defendants Anthropic and its founders Dario Amodei and Benjamin Mann have conducted a brazen campaign of illegally torrenting, scraping, and downloading copyrighted works on a massive scale in order to develop, operate, and reap enormous profits from Anthropic's 'Claude' series of artificial intelligence ('AI') models," the plaintiffs write in the 48-page complaint.

• They also claim that Anthropic pirated thousands of copyrighted musical works and ask for hundreds of thousands of dollars in damages per infringed work.

Between the lines: This suit is not the first time Anthropic has been accused of piracy to train its models.

• In September 2025, the company agreed to the largest copyright settlement in U.S. history, a $1.5 billion deal with authors and publishers.

Yes, but: The music industry is notorious for being litigious when it comes to copyright, as anyone who was around in the heyday of Napster and LimeWire can attest.

For the record: Anthropic was not immediately available to comment on the suit.

Editor's note: This is a developing story.