Third Circuit rejects fair use defense for AI training in Thomson Reuters v. Ross
On September 29, the Third Circuit affirmed summary judgment in Thomson Reuters v. Ross Intelligence, a case over Westlaw headnotes, rejecting the fair use defense for AI training. Commentators note the court did not hold that training on copyrighted material is automatically infringing.
Who is affected and how
- corporate lawyer
- The risk in AI-developer clients' training-data sources and fair use arguments should be reassessed.
- lawyer
- The reasoning in Ross should be analysed for copyright cases, as it may affect the defenses of generative AI defendants.
Sources
- A US appeals court has rejected a ‘fair use’ defense over AI training. What does it mean for the labels’ fight with Suno?music business worldwide · Oct 5, 2026
- An Appeals Court Just Rejected an AI Fair-Use Defense. Music Labels Are Watching. — Exposed Vocalsexposedvocals.com · Oct 5, 2026
- US court upholds finding that AI training not “fair use” | Books+Publishingbooksandpublishing.com.au · Oct 5, 2026
- Appeals Court Rejects AI Training Fair Use Defense In Ruling That Could Shape Suno Fight - USA Heraldusaherald.com · Oct 7, 2026
- Training Day: Third Circuit Affirms Westlaw Headnotes Decision in AI Copyright Fair Use Casejackson walker llp · Oct 5, 2026
- Third Circuit Addresses Fair Use In AI Training, But Leaves Generative AI Questions Unresolvedlegal500.com · Oct 5, 2026
- Everyone Won the Ross Fair Use Appeal. Except Ross. | Copyright Latelycopyrightlately.com · Oct 5, 2026
- A Significant AI Copyright Ruling, With an Important Asteriskaiphotographytraining.substack.com · Oct 5, 2026
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