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Media & Arts·P Space·Evidence-backed problem·Published 2026-09-01

Sony and Warner sue Anthropic over copyrighted song theft used for AI training

Abstract: Sony Music Publishing and Warner Chappell Music have sued Anthropic, accusing the $2 trillion AI company of pirating copyrighted songs at massive scale to train Claude, its family of AI models. The lawsuit, filed Friday in California federal court, alleges Anthropic obtained lyrics and sheet music through torrent downloads and other pirate sources rather than

TRV-2026-0943JournalismPermanent record — cite & verify
Sony and Warner sue Anthropic over copyrighted song theft used for AI training
The quick read

On Friday before the August 31, 2026 publication date, Sony Music Publishing and Warner Chappell Music sued Anthropic in California federal court, alleging the company pirated copyrighted songs at massive scale to train Claude.

The case matters because it escalates the conflict over music rights and AI training data, testing whether obtaining lyrics and sheet music via torrent and pirate sources constitutes infringement; the supplied text is truncated and does not detail Anthropic's response, the specific songs at issue, or any court ruling.

Main points
  • Sony Music Publishing and Warner Chappell Music filed suit against Anthropic in California federal court.
  • The suit accuses Anthropic of pirating copyrighted songs at massive scale to train its Claude family of models.
  • Alleged sourcing method was torrent downloads and other pirate sources for lyrics and sheet music.
Problem

Anthropic allegedly pirated copyrighted songs at massive scale to train its Claude models, obtaining lyrics and sheet music through torrent downloads and other pirate sources.

The rundown

The lawsuit was filed Friday in California federal court by Sony Music Publishing and Warner Chappell Music against Anthropic, described in the article as the $2 trillion AI company behind Claude.

The core allegation is that Anthropic obtained lyrics and sheet music through torrent downloads and other pirate sources rather than licensed channels to build training data for its models.

Sources

Reader signal

How should this claim be treated?

The debate