Sony Music Publishing and Warner Chappell Music sued Anthropic late Friday, accusing the AI lab and its co-founders personally of "one of the largest and most blatant ongoing thefts of intellectual property in history." [1] The complaint, filed in the U.S. District Court for the Northern District of California, names chief executive Dario Amodei and co-founder Benjamin Mann as individual defendants alongside the company, seeking statutory damages of up to $150,000 per work willfully infringed. [1]

The timing is not coincidental to this paper's readers. Thursday, a federal judge ruled that the Pentagon's blacklisting of Anthropic over a refused military use case was unconstitutional retaliation, a due-process win the company's own spokesperson called vindication for its right to say no to a government customer. One day later, two of the three major music publishers filed a complaint accusing the same company of building its flagship product on a foundation of mass piracy — a whiplash from vindicated to freshly accused inside 48 hours that neither story, told alone, captures.

The complaint alleges Mann personally used BitTorrent to download at least five million pirated books from Library Genesis in June 2021, and that Anthropic employees torrented at least two million more from Pirate Library Mirror the following year — both figures drawn directly from findings in Bartz v. Anthropic, the authors' case that produced a $1.5 billion settlement in September 2025 after a judge in the same district found the company's conduct amounted to "straightforward piracy but at massive scale." [1] Sony and Warner Chappell's filing leans on that precedent explicitly, arguing the earlier settlement did nothing to change Anthropic's underlying business model. "Anthropic clearly considers that to be just the cost of doing business given that its entire business model continues to be built on copyright theft," the complaint states, adding that $1.5 billion "is obviously not a large enough settlement to deter infringing conduct by a company that has parlayed such mass infringement into a staggering $2-trillion-dollar valuation." [1]

The suit identifies "tens of thousands" of allegedly infringed compositions, including "Ain't No Mountain High Enough," "Eye of the Tiger," "Livin' on a Prayer," "Hallelujah," "Uptown Funk" and Taylor Swift's "Paper Rings," and alleges Anthropic scraped lyrics from licensed sites including Musixmatch and LyricFind, ran a "destructive scanning" operation on secondhand books, and trained on Common Crawl, The Pile and Books3 material Mann is quoted internally as downloading "to avoid the trouble of paying for" it. [1] The publishers are demanding a jury trial, destruction of infringing copies and a full accounting of Claude's training data. [1] An Anthropic spokesperson told TechCrunch the company disagrees with the claims and "intend[s] to defend ourselves robustly in court." [2]

This is not Anthropic's first music-industry fight. Universal Music Publishing Group, Concord Music Group and ABKCO sued the company in October 2023 over roughly 500 songs, expanded that case in January to more than 20,000 works and $3 billion in damages, and BMG filed a third suit in March over 493 compositions before Round Hill Music brought a fourth on August 17. [1] With Sony Music Publishing and Warner Chappell now suing directly, the publishing arms of all three major music companies are litigating against Anthropic simultaneously — the broadest and most legally aggressive filing yet, built explicitly to use the Bartz precedent as a lever against a fair-use defense the publishers argue cannot survive proof the underlying training data was pirated rather than licensed. [1]

What Thursday's Pentagon ruling and Friday's lawsuit share, and what neither piece of coverage sits with directly, is a company whose legal posture keeps splitting along the same fault line: courts are increasingly willing to credit Anthropic's right to refuse a customer's demands, while simultaneously finding the company acquired the raw material for its models through methods it cannot defend. The due-process win protects Anthropic's ability to say no to the Pentagon. It does nothing to answer whether the company can say yes to a court asking how millions of pirated books and tens of thousands of copyrighted songs ended up inside Claude in the first place. [1]

Naming Amodei and Mann personally, rather than only the corporate entity, is itself a signal about where Sony and Warner Chappell think the exposure should land — a jury verdict against individuals carries a different weight than one against a company already conditioned to treat nine-figure settlements as a line item. Whether that strategy survives motion practice is unresolved. That the publishers are trying it, one day after a federal judge told the Pentagon it could not punish Anthropic for its principles, is the story this week produced and neither headline alone told.

-- THEO KAPLAN, San Francisco