Sony, Warner sue Anthropic for pirating songs to train Claude

Sony Music Publishing and Warner Chappell Music filed suit against Anthropic in the U.S. District Court for the Northern District of California on August 29, 2026, accusing the AI company of conducting a "brazen campaign of illegally torrenting, scraping, and downloading copyrighted works on a massive scale" to develop and operate Claude AI models Reuters.

The Complaint and Defendants

The complaint names Anthropic, CEO Dario Amodei, and co-founder Benjamin Mann as defendants Business Insider. According to the filing, Anthropic "pirated hundreds of song lyrics and sheet music" from major artists including The Beatles, Taylor Swift, and Michael Jackson Reuters. The suit seeks statutory damages of up to $150,000 per infringed composition and demands a jury trial TechCrunch.

Broader Context in AI Training Litigation

The lawsuit represents a significant enforcement action in an emerging pattern of copyright disputes over AI model training datasets. Music publishers have become increasingly vocal about unlicensed use of compositions in large language model development. The filing alleges systematic, large-scale data acquisition rather than incidental infringement, framing the conduct as intentional IP theft rather than a gray-area training practice.

Anthropics' Claude models have become central to enterprise AI deployments across industries. The complaint targets both the company's development practices and the ongoing operation of models trained on allegedly infringing material, suggesting the plaintiffs view the harm as continuous rather than historical.

What Comes Next

The case is now in the federal court system in Northern California, one of the primary venues for IP litigation against major tech companies. The presence of CEO-level defendants and the scale of claimed infringement—"hundreds" of works across multiple high-profile artists—suggests the plaintiffs are pursuing maximum legal and reputational pressure. Statutory damages frameworks in copyright law allow for significant exposure if liability is established.

This filing adds to mounting legal challenges facing large AI model developers over training data provenance, following similar suits from news publishers, authors, and visual artists.