Artificial Intelligence
Music Publishers Sue Anthropic Over 20,000 Illegal Downloads
Updated on Thu, Jan 29, 2026
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TL;DR
- Music publishers sued Anthropic over alleged illegal downloads of 20,000 works.
- Damages could have exceeded $3 billion, making it one of the largest copyright cases.
- The case followed earlier rulings that allowed AI training but not piracy.
A group of major music publishers, led by Concord Music Group and Universal Music Group, has filed a new lawsuit against Anthropic, accusing the AI company of illegally downloading more than 20,000 copyrighted music works.
The material allegedly includes song lyrics, sheet music, and full musical compositions. According to the publishers, the damages could cross $3 billion amount that would place this among the largest non-class action copyright lawsuits ever filed in the U.S.
The case isn’t coming out of nowhere. It closely follows Bartz v. Anthropic, a lawsuit brought by fiction and nonfiction authors and handled by the same legal team. In that earlier case, authors claimed Anthropic used their copyrighted works to train its AI models, including Claude.
Judge William Alsup ruled that training AI on copyrighted content can be legal but drew a sharp line when it comes to how that content is obtained. Acquiring copyrighted works through piracy, he said, is not allowed.
That ruling ultimately led to a $1.5 billion penalty for Anthropic, with affected writers receiving about $3,000 per work. While the figure sounds massive, critics noted it was far from devastating for a company reportedly valued at $183 billion.
The music publishers originally sued Anthropic over the use of roughly 500 copyrighted works. But during the discovery process in the Bartz case, they say they uncovered evidence that Anthropic had downloaded thousands more songs illegally.
An attempt to amend the original lawsuit was denied last October, with the court saying the publishers failed to investigate the piracy claims earlier. That decision pushed them to file this separate lawsuit instead.
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The new case also names Anthropic CEO Dario Amodei and co-founder Benjamin Mann as defendants. In the filing, the publishers don’t hold back, stating, “While Anthropic misleadingly claims to be an AI ‘safety and research’ company, its record of illegal torrenting of copyrighted works makes clear that its multibillion-dollar business empire has in fact been built on piracy.”
As courts continue to wrestle with how AI is trained and where the legal boundaries lie, this lawsuit could become another key test of how far AI companies can go before crossing the line.
First published on Thu, Jan 29, 2026
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