OpenAI has suffered a legal setback in its copyright battle, as a federal judge ruled that authors can pursue claims the company unlawfully downloaded their books.

U.S. District Judge Sidney H. Stein denied OpenAI’s motion to strike what the company characterized as a new “download claim” in a ruling Monday, finding that prior complaints adequately notified OpenAI of infringement allegations based on downloading and reproducing copyrighted books.

“A complaint need not pin plaintiff’s claim for relief to a precise legal theory,” Judge Stein said in his ruling, noting that “factual allegations alone are what matters.”

He granted OpenAI partial relief, striking allegations about GPT-4V, GPT-4.5, GPT-5, and any “derivatives” or “successors,” on the ground that his May order confines the case to seven models (GPT-3 through GPT-4o Mini).

The “download claim” dispute

The case is part of a massive multidistrict litigation (MDL) consolidating numerous copyright lawsuits against OpenAI and Microsoft in New York’s Southern District. An MDL combines similar cases from different courts into one proceeding for eff

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Author: Vismaya V