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Intellectual Property

Jul. 18, 2025

Judge certifies class against Anthropic for copyright infringement

Federal judge certifies class action against Anthropic for pirating 7 million books to train AI assistant Claude, rejecting fair use defense. Trial set for December.

A federal judge in San Francisco certified a class action against Anthropic PBC on Thursday brought by authors accusing the company of copyright infringement three weeks after the court found Anthropic illegally pirated 7 million books online to train its AI assistant Claude.

The plaintiffs sued Anthropic over claims that the "cutting edge" AI virtual assistant is built on "widespread" copyright infringement and pirating of written works from across the interne...

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