Sony Music and Warner Chappell Sue Anthropic for Billions Over AI Training Data
The lawsuit names Anthropic co-founders personally and alleges employees downloaded millions of pirated books and scraped licensed song lyrics to train the Claude AI.
Key points
- Sony Music and Warner Chappell filed suit against Anthropic in the US District Court for the Northern District of California on 29 August 2026.
- The companies seek up to $150,000 per copyrighted work across "tens of thousands" of songs, with total damages potentially reaching several billion dollars.
- Co-founders Dario Amodei and Benjamin Mann are named as individual defendants, not just the company.
- The suit alleges Anthropic employee Benjamin Mann used BitTorrent to download over five million pirated books, and staff downloaded at least two million more from a pirate library site.
- Anthropic recently settled a separate lawsuit from the publishing industry for $1.5 billion.
Two of the world's biggest music companies are taking Anthropic, the maker of the Claude AI assistant, to court. Sony Music and Warner Chappell Music filed their lawsuit in federal court in San Francisco, calling the alleged conduct "one of the largest and most blatant ongoing thefts of intellectual property in history."
Claude is a large language model, the same kind of technology that powers chatbots like ChatGPT. To build such a system, developers feed it enormous quantities of text so it learns patterns in language. The lawsuit claims that text included copyrighted song lyrics and books that Anthropic had no right to use.
What exactly does the lawsuit claim happened?
Anthropologists describes a pattern of alleged piracy, not just passive scraping. The complaint says co-founder Benjamin Mann personally used BitTorrent, a file-sharing network, to download more than five million pirated books. Other Anthropic employees allegedly downloaded at least two million more from a site called Pirate Library Mirror.
On the music side, the suit claims Anthropic scraped lyrics from services like MusixMatch and LyricFind. Those services had paid the labels and publishers for proper licences. Anthropic, the complaint argues, took the words without paying anyone.
Specific songs named in the filing include Marvin Gaye and Tammi Terrell's "Ain't No Mountain High Enough", Bon Jovi's "Livin' On a Prayer", Earth Wind and Fire's "September", Leonard Cohen's "Hallelujah", and Taylor Swift's "Paper Rings".
The damages math is striking. Plaintiffs are asking for up to $150,000 per copyrighted work across tens of thousands of songs, plus up to $25,000 for each time identifying copyright information was stripped from a file. At maximum, the bill could run into several billion dollars.
Is this Anthropic's first copyright problem?
Far from it. Anthropic recently settled a lawsuit brought by major book publishers for $1.5 billion. The company has also faced separate suits from Universal Music Group, Concord, ABKCO, BMG, and Round Hill Music. This latest action, first reported by The Verge, adds Sony and Warner to that growing list.
Anthropologic did not respond to a request for comment before publication.
What does this mean for ordinary people?
If you use Claude at work or at home, nothing changes today. But these cases, taken together, are pushing courts to set rules about what AI companies can and cannot use as training material. Those rules will shape which AI tools exist, how they are priced, and whether creators get paid when their work helps build them.
Common questions
Why are the founders named personally, not just the company?
Naming individuals like Dario Amodei and Benjamin Mann as defendants lets plaintiffs argue those people made deliberate decisions to use pirated material, which can lead to larger penalties than suing a company alone.
What is a BitTorrent download, and why does it matter here?
BitTorrent is a popular method for sharing large files across the internet, often used to distribute pirated content. Alleging that a co-founder used it personally to collect copyrighted books strengthens the claim that the infringement was intentional rather than accidental.
Could this affect Claude in the future?
Possibly. If courts order Anthropic to pay large damages or restrict what data it can use going forward, the company may have to retrain or modify Claude, which could change how it performs.
