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Minderoo Centre at Cambridge files brief opposing summary judgment for OpenAI and Microsoft

Oct 30, 2026 · Gathered automatically from public sources. Not reviewed by a person.

What happened

On 30 October 2026, the Minderoo Centre for Technology and Democracy at the University of Cambridge filed a proposed amicus brief opposing OpenAI and Microsoft's motions for summary judgment in In re OpenAI, Inc. Copyright Infringement Litigation, the consolidated copyright multidistrict litigation before Judge Sidney H. Stein in the Southern District of New York (No. 1:25-md-03143). 30 October was the court's deadline for amicus briefs; replies are due 20 November 2026 and no ruling date has been set.

What the brief argues

Minderoo argues that the factual account of what training does with a book is disputed and material, and therefore cannot be resolved on summary judgment. It says OpenAI's account treats the issue as one of preventing regurgitation rather than of what the models retain and use after training, and that the record contains evidence on both sides of what the accused models retain. It also argues that Microsoft's market evidence leaves a competing record on dilution of the market for well-known authors' books unaddressed. The Centre states it has no financial interest in the outcome and that no party or party's counsel authored the brief.

Status

This is a proposed amicus brief, not a ruling. It is a plaintiff-side brief in the same 30 October amicus round as the defendant-side briefs already published on this site.

Sources