Newly unsealed court filings in the Authors Guild's copyright lawsuit against OpenAI and Microsoft allege that executives and employees at both companies knew their AI models were being trained on pirated books — and proceeded anyway, internal messages cited in the documents suggest.
The Authors Guild, the oldest and largest professional organization for published writers in the United States with more than 18,000 members, publicized the filings in a September 21 statement describing documents released the previous week in the long-running case. The story gained fresh traction over the weekend when it became one of the most-upvoted posts on Hacker News, reigniting debate over how the leading AI labs acquired their training data.
What the Filings Claim
According to the Authors Guild, the unsealed briefs — filed on behalf of a class of book authors — argue that OpenAI's own internal communications show the company understood that mass-copying copyrighted books without permission was legally risky. The guild's statement highlights several quoted phrases from the documents, including references to sourcing books from a "sketchy Russian website" and internal discussion of releasing products "that will make people unemployed."
The filings also warn, in the guild's framing, that "OpenAI's GPT models pose an existential threat to those who write and publish books."
Authors Guild CEO Mary Rasenberger said in the statement that the documents reveal "shocking disdain for writers and their work through repeated, intentional decisions to steal books rather than pay for them with full knowledge that their products will destroy the careers of authors."
It is important to note that these are allegations advanced by the plaintiffs in a motion — not findings of fact by the court. OpenAI and Microsoft have consistently argued that training large language models on copyrighted material constitutes fair use, a defense the Trump administration has previously backed in a statement of interest filed in a separate case brought by The New York Times.
Who Is Suing
The plaintiffs list reads like a who's-who of American letters: the Authors Guild is joined by writers including David Baldacci, Taylor Branch, Michael Connelly, Sylvia Day, Jonathan Franzen, Christopher Golden, Andrew Sean Greer, John Grisham, David Henry Hwang, Matthew Klam, George R.R. Martin, Jodi Picoult, Stacy Schiff, and James Shapiro, among others.
The class action, known as Alter v. OpenAI and Microsoft, is led by attorney Justin A. Nelson of the firm Susman Godfrey. It is part of a broader multidistrict litigation against the two companies pending in Manhattan federal court, where a growing docket of copyright cases against AI developers has been consolidated.
The Procedural Road Ahead
The newly public documents are drawn from two filings: the Class Plaintiffs' Memorandum of Law in Support of Motion for Partial Summary Judgment (Docket 1982) and the Class Plaintiffs' Corrected Rule 56.1 Statement of Undisputed Material Facts (Docket 1987). In plain terms, the authors are asking the court to rule on core liability questions without a full trial, arguing the factual record is already undisputed.
The Authors Guild says it expects additional briefing over the next couple of months, with a hearing anticipated in early 2027. That timeline makes this one of the most consequential AI copyright cases to watch heading into next year, alongside similar suits brought by news organizations, music publishers, and visual artists.
Alongside the authors' brief, the guild's statement references what it calls "equally scorching but separate revelations" in a filing submitted by news media organizations with their own copyright claims against the companies.
Why the Stakes Are So High
The outcome of the authors' case could reshape the economics of the entire generative AI industry. If the court rejects the fair use defense and finds that training on pirated books was infringement, OpenAI and Microsoft could face damages that scale with the sheer number of works involved — and every AI lab training on scraped books would face similar exposure.
A ruling for the defendants, by contrast, would cement the legal foundation on which most frontier models have been built. Either way, the unsealed briefs have handed the public a rare look at how the industry's most valuable products were actually made — and the plaintiffs hope, a jury's eventual judgment on whether that process was lawful.
For working writers, the case is about more than back pay. The guild argues that AI-generated substitutes are already depressing demand for human authorship, a claim that frames the litigation as existential for the publishing ecosystem rather than merely compensatory.
Both OpenAI and Microsoft are expected to respond to the summary judgment motion in the coming weeks. Until then, the explosive quotes remain allegations — but allegations now sitting in a public court file, where they will anchor the argument every time this case moves closer to trial.
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