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Microsoft Sued by Authors Over Use of Books in AI Training

Tech companies have argued that they make fair use of copyrighted material to create new, transformative content.

Microsoft Sued by Authors Over Use of Books in AI Training

Photo Credit: Reuters

The authors requested a court order blocking Microsoft's infringement and statutory damages

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Highlights
  • The lawsuit has been filed in New York federal court on Tuesday
  • It is one of several high-stakes cases brought by authors
  • Tech firms have argued that they make fair use of copyrighted materials
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Microsoft has been hit with a lawsuit by a group of authors who claim the company used their books without permission to train its Megatron Artificial Intelligence (AI) model.

Kai Bird, Jia Tolentino, Daniel Okrent and several others alleged that Microsoft used pirated digital versions of their books to teach its AI to respond to human prompts. Their lawsuit, filed in New York federal court on Tuesday, is one of several high-stakes cases brought by authors, news outlets and other copyright holders against tech companies including Meta Platforms, Anthropic and Microsoft-backed OpenAI over alleged misuse of their material in AI training.

The complaint against Microsoft came a day after a California federal judge ruled that Anthropic made fair use under US copyright law of authors' material to train its AI systems but may still be liable for pirating their books. It was the first US decision on the legality of using copyrighted materials without permission for generative AI training.

Spokespeople for Microsoft did not immediately respond to a request for comment on the lawsuit. An attorney for the authors declined to comment.

The writers alleged in the complaint that Microsoft used a collection of nearly 200,000 pirated books to train Megatron, an algorithm that gives text responses to user prompts. The complaint said Microsoft used the pirated dataset to create a "computer model that is not only built on the work of thousands of creators and authors, but also built to generate a wide range of expression that mimics the syntax, voice, and themes of the copyrighted works on which it was trained."

Tech companies have argued that they make fair use of copyrighted material to create new, transformative content, and that being forced to pay copyright holders for their work could hamstring the burgeoning AI industry.

The authors requested a court order blocking Microsoft's infringement and statutory damages of up to $150,000 (roughly Rs. 1.28 crore) for each work that Microsoft allegedly misused.

© Thomson Reuters 2025

(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.)

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