Sony and Warner sue Anthropic for 'brazen' lyric piracy in training Claude
Sony Music Publishing and Warner Chappell Music filed a sweeping federal copyright lawsuit against Anthropic late Friday, accusing the AI lab of running a "brazen campaign of illegally torrenting, scraping, and downloading" tens of thousands of songs to train Claude — and they put CEO Dario Amodei and co-founder Benjamin Mann's names on the complaint alongside the company itself. The suit, filed in U.S. District Court for the Northern District of California (case 5:26-cv-09217), is the largest music-industry action against a frontier model maker yet, and it's the first to put individual founders in the defendant's seat.
The complaint catalogues specific works it says Anthropic ingested and on which Claude was trained: Mariah Carey's "All I Want for Christmas Is You," Taylor Swift's "Paper Rings," Leonard Cohen's "Hallelujah," Bon Jovi's "Livin' on a Prayer," "Ain't No Mountain High Enough," "Eye of the Tiger," and "Here Comes Santa Claus," among others. Sony and Warner describe the conduct as "one of the largest and most blatant ongoing thefts of intellectual property in history" — and they're asking for the statutory maximum of up to $150,000 per infringed work, plus an order forcing Anthropic to destroy its database of allegedly pirated lyrics and all files used to train on them.
The most legally interesting allegation isn't the volume. It's the method. The publishers claim Anthropic obtained the lyrics from pirated books downloaded from illegal sites, from physical books it purchased and scanned, and from bulk scrapes that violated websites' terms of service. That last point — torrenting plus terms-of-service breaches — is what makes Anthropic's standing fair-use defense much harder than it would be for the typical "we crawled the open web" argument. Anthropic has consistently said its training qualifies as fair use; the plaintiffs are betting the how defeats the what. Anthropic told TechCrunch it "disagreed with the claims and would defend itself vigorously in court."
What makes the timing awkward is the math. Anthropic just finalized a roughly $1.5 billion settlement with authors who accused it of pirating books for the same Claude models the new complaint says also ingested copyrighted music. Sony and Warner seized on that in their filing, characterizing the authors' payout as evidence that Anthropic treats infringement settlements as a cost of doing business — not as a deterrent. Coming on top of UMG and Sony's earlier $9 billion suit against Suno, the music industry is making clear it now treats model-training data sourcing as a board-level risk, not a legal footnote.
The founder-naming move is the part to watch. Putting Dario Amodei and Benjamin Mann on a complaint turns what would normally be a corporate liability question into a personal one — and it telegraphs that publishers want discovery into who at Anthropic knew the training data was sourced the way it was, and when they knew it. If plaintiffs get that discovery and the names show up in emails approving the acquisition pipeline, the settlement math changes overnight.
What to watch: how quickly the judge sets a schedule, whether Anthropic moves to strike the founder defendants before discovery opens, and whether any other major publisher (UMG, Concord, Round Hill, BMG) files a parallel complaint in the same court within the next few weeks.
Do you think naming AI-lab founders personally in training-data suits will become the new normal, or will judges strike the claims before discovery opens? Tell us in the comments.
