What the authors have asked the judge to decide
On September 4, the Authors Guild and named co-plaintiffs filed for summary judgment in the consolidated litigation before Judge Sidney H. Stein. Their motion asks the court to hold that OpenAI and Microsoft infringed copyright by obtaining allegedly pirated books, copying them for model training and exchanging the material between them, and to reject fair use. The Authors Guild's account links to the plaintiffs' brief and names writers including David Baldacci, George R.R. Martin, Jodi Picoult and John Grisham. These are the plaintiffs' allegations and legal arguments. Filing them does not make the allegations judicial findings.
Why competing motions do not equal a verdict
OpenAI and Microsoft also filed summary-judgment motions, asking for rulings on their side of the consolidated disputes. Summary judgment is available when a court concludes that no material factual dispute requires a trial and the law permits a decision. A judge can grant a motion in whole or part, deny it, or leave issues for trial. The Authors Guild says fact and expert discovery finished during the summer, with oppositions due in early October and replies in early November. Until the court rules, neither side can claim that the motions establish infringement, validate fair use, determine damages or resolve every work and plaintiff in the multidistrict case.
The consequence reaches authors and AI developers
For writers and readers, the litigation concerns whether training practices can use book-length works without permission and what remedies follow if they cannot. For developers and publishers, rulings could affect licensing pressure, evidence requirements and which claims proceed to trial. The case is especially consequential because the plaintiffs frame market substitution and uncompensated copying as central harms, while the defendants' full answers and defenses must be assessed through their own filings and the court's reasoning. The next useful development is not another party's characterization of the record, but the opposition briefs, replies and an order showing which facts and legal questions the judge considers genuinely disputed.