Microsoft counts 59,545 Copilot overlaps

Microsoft told a federal court that 59,545 of 8.2 million Copilot chat logs it produced in copyright discovery contained at least 16 words in common with news content, while a separate analysis found only 24 responses with at least 30 matching words, The Verge reports from the filings. The figures are Microsoft’s litigation position, disputed by The New York Times, not a ruling on fair use; they do put a measurable boundary around its claim that Copilot output rarely substitutes for source text. Teams shipping retrieval or training systems should log provenance and test verbatim overlap, because the archive’s analysis of AI music’s statutory exposure shows how quickly an output question becomes a data-rights question.