Highlights

Sony Music Publishing, Warner Chappell and other publishers have filed suit against Anthropic and founders Dario Amodei and Benjamin Mann, accusing the AI company of a brazen campaign of illegally torrenting, scraping, and downloading copyrighted works to train its Claude model. The complaint, filed in the U.S. District Court for the Northern District of California, alleges large-scale piracy involving millions of books, including materials with lyrics and sheet music. This action builds on previous litigation against Anthropic and raises new, broader accusations of systematic infringement.

Sentiment Analysis

• The overall sentiment of the article is mixed to negative toward Anthropic, focusing on serious legal allegations and potential misconduct. The tone emphasizes harm to rights holders and the gravity of the claims while noting ongoing legal context and past rulings. There is limited sympathetic language for Anthropic, primarily factual mentions that the company had not responded at the time of reporting. The reporting frames the publishers as pursuing enforcement of intellectual property rights and highlights escalation from earlier lawsuits.





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Article Text

Major music publishers, including Sony Music Publishing and Warner Chappell, have initiated a new lawsuit against Anthropic and its co-founders, Dario Amodei and Benjamin Mann. Filed in the U.S. District Court for the Northern District of California, the complaint alleges that Anthropic engaged in a concerted effort to obtain copyrighted materials through illegal means—specifically torrenting, scraping, and mass downloading—and then used those works to train its AI model, Claude. The publishers describe this conduct as a deliberate campaign to acquire protected content without authorization.

The filing asserts that Anthropic used thousands of copyrighted works during model training and accuses the company of "blatant theft". According to the complaint, the scope of the alleged piracy is substantial, encompassing millions of book copies, some of which include song lyrics and sheet music. The publishers argue that this conduct goes beyond standard data collection practices and amounts to systematic infringement that has harmed copyright holders.

Anthropic had not provided a comment by the time the complaint was reported. The lawsuit was first publicized by industry outlet Music Business Worldwide, and news organizations covering the case noted that this action is part of a series of legal challenges the AI lab now faces. Earlier cases involving the same parties and related counsel have already raised similar issues about how copyrighted material was acquired and used in model training.

Notably, some of the lawyers representing the current group of publishers also acted in prior litigation against Anthropic. Those prior cases include a suit involving Concord Music Group and Universal Music Group filed earlier in the year, as well as Bartz v. Anthropic, in which a group of authors alleged that Anthropic used copyrighted works to train systems such as Claude. In the Bartz case, a judge found that while using copyrighted works for AI training may be legally complex, the method of acquisition—specifically through piracy—was unlawful, and Anthropic was ordered to pay $1.5 billion. This earlier ruling is referenced by the new complaint as part of the broader legal landscape.

While the new complaint echoes arguments from previous litigation, it is broader in scope. The current filing amplifies accusations of "flagrant piracy," asserting that Anthropic obtained vast quantities of copyrighted books through illegal torrenting and other unauthorized channels. The publishers stress that their claims reach beyond isolated incidents and portray a sustained pattern of acquiring protected content to benefit AI development. They emphasize the inclusion of materials that contain not only text but also musical elements such as lyrics and sheet music, which are core assets for music publishers.

The lawsuit’s broader allegations may increase scrutiny of data acquisition practices across the AI industry and could influence how courts assess the legality of training data sources. Publishers argue that protecting creative works and enforcing copyright law is essential to preserving the rights and revenues of authors and composers. Anthropic’s prior legal setbacks and the presence of overlapping counsel suggest a coordinated strategy among rights holders to challenge the company’s practices.

Observers note that the case raises difficult questions about the boundary between lawful training use and unlawful acquisition. The plaintiffs highlight that even if model training can be permissible in some contexts, acquiring copyrighted works through piracy is not lawful, a point underscored by earlier rulings. How courts interpret these distinctions in the present, broader complaint will likely shape future litigation and industry standards for sourcing training data.

As the case proceeds, stakeholders in technology, publishing, and law will watch for developments that could set new precedents. The outcome may affect not only Anthropic but also other AI developers that rely on large-scale data collection. For now, the filing represents a significant escalation in legal action by major music publishers asserting that unlawful methods were used to build AI capabilities.

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