Sony Music and Warner Chappell Sue Anthropic Over AI Copyright Infringement

Sony Music Publishing and Warner Chappell Music have launched a high-profile copyright lawsuit against Anthropic in federal court. The music titans claim Anthropic systematically ingested tens of thousands of copyrighted song lyrics and musical compositions to train Claude without license or compensation.

In one of the most significant legal challenges facing the artificial intelligence industry to date, Sony Music Publishing and Warner Chappell Music have jointly filed a federal copyright infringement lawsuit against Anthropic. The complaint alleges that the AI lab engaged in a systemic, unauthorized campaign of scraping and ingesting protected musical works and song lyrics to build and fine-tune its Claude model family.

According to legal filings, the music publishers document numerous instances where Claude generated verbatim song lyrics and near-identical musical arrangements upon simple user prompts. The plaintiffs argue that Anthropic's commercial exploitation of their creative catalogs undermines established licensing frameworks and diminishes the fair market value of human composition.

The lawsuit seeks substantial statutory damages, injunctive relief to freeze further model training on unlicensed content, and mandatory purging of dataset weights derived from copyrighted song catalogs. Industry analysts note that this case could establish critical legal precedents regarding fair use protections in generative AI training pipelines.