Third Circuit’s Decision on AI Fair-Use Defense

In an eagerly awaited appellate decision on AI training and copyright fair use, the U.S. Court of Appeals for the Third Circuit decided that an AI-powered legal research platform infringed copyrights in Westlaw content used to train the platform.

5 minute read November 01, 2026 at 12:07 AM
By
Riley Brennan
Third Circuit’s Decision on AI Fair-Use Defense

In an eagerly awaited appellate decision on AI training and copyright fair use, the U.S. Court of Appeals for the Third Circuit decided that an AI-powered legal research platform infringed copyrights in Westlaw content used to train the platform.

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