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Sony Music Publishing et al v Anthropic PBC et al

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Case Information
Case name Sony Music Publishing et al v. Anthropic PBC et al[1]
Court U.S. District Court for the Northern District of California[1]
Docket 5:26-cv-09217[1]
Filed August 28, 2026[1]
Judge(s) Not identified in the sources reviewed.
Plaintiffs Sony Music Publishing (US) LLC; Warner Chappell Music, Inc.; affiliated publishers listed in the complaint[1]
Defendants Anthropic PBC; Dario Amodei; Benjamin Mann[1]
Case type Civil copyright action[1]
Claims / issues Copyright infringement involving musical compositions and lyrics[1]
Status Complaint filed August 28, 2026. Later developments have not been verified.[1]

Sony Music Publishing et al. v. Anthropic PBC et al. is a federal copyright action alleging unauthorized copying and use of musical compositions in the development and operation of Anthropic’s Claude models.[2]

Allegations

The plaintiffs allege that Anthropic obtained protected lyrics and sheet music through BitTorrent downloads from LibGen and PiLiMi, web scraping, third-party datasets, and destructive scanning of physical books.[2] They allege that Anthropic copied tens of thousands of musical compositions in model training and that Claude generated verbatim, near-verbatim, derivative, and competing lyric outputs.[2]

The complaint alleges that Dario Amodei and Benjamin Mann directed or approved torrenting activity, and that Anthropic removed or altered copyright-management information while processing training material and generating outputs.[2]

Claims and relief

The complaint asserts direct copyright infringement, contributory copyright infringement, and removal or alteration of copyright-management information under 17 U.S.C. § 1202.[2] The plaintiffs seek statutory or actual damages, attributable profits, injunctive relief, attorneys’ fees and costs, and a jury trial.[2]

Significance

The action challenges both alleged input-stage copying for Claude training and alleged output-stage reproduction of protected lyrics.[2]

See Also

References