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Microsoft Told a Federal Court That 8.2 Million Copilot Logs Contain 24 Matching Responses
In a September 4 summary judgment filing in Manhattan federal court, Microsoft argued that training Copilot's model on books and news is fair use, and backed it with discovery numbers. Publishers' own expert, given 8.2 million Copilot conversation logs, found 24 responses containing at least 30 consecutive words matching the source texts, and found matches for only 10 of 212 assessed books. The filing lands the same week the DOJ took the government's first position in AI training copyright litigation, siding with OpenAI.
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