AI news story
Microsoft Tells Court Copilot Rarely Reproduces Books in AI Copyright MDL
Microsoft moved for summary judgment on September 4, 2026 in the consolidated copyright litigation brought by book authors and news publishers over the training of large language models, telling a federal court in Manhattan that an expert's review of
Editor's take
Microsoft asserted to a federal court that its Copilot AI models do not frequently replicate entire books within their outputs, aiming to dismiss copyright infringement claims from authors and publishers.
This defense is critical as it directly addresses the core accusation of wholesale reproduction, which forms the basis of many large-scale copyright lawsuits against AI developers like OpenAI and Microsoft. The outcome could significantly impact how LLMs are trained and deployed, influencing the economics of creative industries and the legal frameworks governing AI-generated content.
Future developments will hinge on the court's interpretation of "rarely reproduces" and the methodologies used to assess output similarity. The ability of AI to demonstrably avoid substantial reproduction will be key, potentially shifting focus to the fair use argument for training data rather than output infringement.
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Original reporting
This story summarises reporting published by Unite.AI. Read the original article at Unite.AI.