Sony and Warner sue Anthropic over pirated training books. The per-work bill is $150,000

Sony Music Publishing and Warner Chappell sued Anthropic late Friday in a claim priced at up to $150,000 per copied work.

The complaint also names co-founders Dario Amodei and Benjamin Mann, the filing said.

The claim sits in the US District Court for the Northern District of California. Music Business Worldwide reported the suit first. It calls the conduct a "brazen campaign of illegally torrenting, scraping, and downloading copyrighted works."

Books sit at the centre of it. The publishers allege piracy at scale. Millions of copies went through illegal downloads, they said, and the haul includes lyrics and sheet music.

Anthropic answered within hours.

"We disagree with the publishers' claims and we intend to defend ourselves robustly in court," the company said in a statement to TechCrunch.

The per-work math is the point

Copyright law sets statutory damages (fixed sums a court may award) at a ceiling per case. The wilful number is $150,000 per copied work.

The January case built on the same theory reached a $3 billion claim over 20,000 works.

Same lawyers, larger catalogue this time. The TechCrunch reporting says some of the January lawyers brought this one too. Their clients also include Concord Music Group and Universal Music Group.

Precedent cuts both ways after Bartz v. Anthropic, a case brought by authors.

A judge ruled Anthropic's use of books for training was legal. The same judge then ordered the lab to pay $1.5 billion because acquisition through piracy was illegal. The settlement cleared court approval in July 2026.

So the money question has narrowed: what costs you is how you got the data, less what you trained on.

What it costs a copyright claimant

Precedent helps Sony and Warner. Bartz turned a piracy theory into a $1.5 billion payment, and statutory damages mean the per-work headline grows on its own.

Anthropic has money and urgency. It filed initial public offering (IPO) paperwork weeks after this suit, and litigation overhang is something IPO investors price. The $80.7 billion first-half net loss already got its headlines.

I think the timing looked deliberate from both sides. Anthropic filed to go public in late October, and publishers filed against it in late August, about nine weeks earlier.

The unresolved edge: trial dates. Copyright cases in the Northern District of California take years, and an October filing against a November roadshow sets up a fight over disclosure, less a fight about verdicts.

For anyone who licenses music or text into AI training, the message is about method more than price. Legitimate licensing, like the deals some rivals have signed, prices catalogues now.

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