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Bartz et al v. Anthropic PBC

  1. July 29, 2025

    Authors Fight Anthropic's Appeal Of Fair Use Ruling

    Authors battling artificial intelligence firm Anthropic over its use of their books to train a large language model have urged a California federal judge to disallow a mid-case appeal of his ruling that Anthropic could use books it bought legally, but not the millions it purportedly lifted from online libraries of pirated works.

  2. July 28, 2025

    Authors Want Court To Reject Anthropic's Bid To Delay Trial

    A group of authors urged a California federal court Monday to reject Anthropic PBC's request to pause their copyright case while Anthropic appeals the court's recent class certification order, arguing that the company has "no basis for a stay" and is trying to deprive them of their day in court.

  3. July 25, 2025

    Anthropic Asks To Stay Copyright Suit To Appeal Class Cert.

    Anthropic PBC has said it will seek a quick appeal to the Ninth Circuit of a California federal judge's decision last week to certify a class of owners of copyrights for books included in pirate websites that were downloaded by the AI developer to train its Claude generative text model.

  4. July 23, 2025

    Anthropic Judge Says Authors Can Seek OpenAI Docs In NY

    A California federal judge on Wednesday told a certified class of authors claiming Anthropic stole their work to train its AI technology that they have his blessing to ask a New York court overseeing copyright litigation against OpenAI and Microsoft to produce documents and deposition testimony related to the California case.

  5. July 17, 2025

    Authors Win Cert. In Copyright Suit Against Anthropic

    A California federal judge on Thursday certified a class of copyright owners of books in the online pirate libraries Library Genesis and Pirate Library Mirror that were downloaded by artificial intelligence firm Anthropic for training its Claude generative text model.

  6. July 15, 2025

    Anthropic Seeks 9th Circ. Fair Use Appeal Over Piracy Claims

    Anthropic PBC asked a California federal judge Tuesday to let the Ninth Circuit review his decision that making fair use of copyrighted books to train artificial intelligence technology did not absolve the company of potential liability for alleged piracy.

  7. July 08, 2025

    The Biggest Copyright Rulings Of 2025: A Midyear Report

    Two California judges were the first to deliver crucial rulings about what constitutes fair use in training generative artificial intelligence models — a question expected to test the boundaries of the copyright doctrine amid the emergence of the groundbreaking technology. Here is Law360's list of the biggest copyright decisions so far this year.

  8. June 24, 2025

    Anthropic Can Train AI On Books But Faces Trial On Pirating

    A California federal judge said artificial intelligence firm Anthropic can use books to train its LLM under the principle of fair use, but said the company would go to trial against a group of authors over the storage of millions of pirated books.

  9. May 22, 2025

    Training LLMs Is OK, Pirating Isn't: Anthropic Judge Tips Hand

    A California federal judge considering writers' copyright suit against Anthropic indicated Thursday that he thinks training its LLM with copyrighted works is fair use, but said plaintiffs can likely pursue claims that the AI startup infringed by obtaining those training materials from pirating websites instead of buying them.

  10. April 03, 2025

    Alsup Calls Out Anthropic Over Missed Discovery Deadlines

    U.S. District Judge William Alsup scolded Anthropic for again delaying discovery production in a proposed class action accusing the artificial intelligence startup of exploiting the copyrighted works of journalists and authors to train its large language model.