Appeals court upholds Thomson Reuters win: AI training on its material is not fair use
On September 29 the US Court of Appeals for the Third Circuit upheld Thomson Reuters' (Westlaw) win against an AI competitor that used Westlaw headnotes for training. According to the sources, it is the first appellate ruling on AI training and fair use.
Who is affected and how
- lawyer
- In AI copyright cases, the ruling can serve as a starting point for arguments against fair use.
- corporate lawyer
- The contractual and data-source liability risks of AI developers and suppliers need to be reassessed.
- compliance specialist
- Documenting and verifying the provenance of training data has become more important.
Sources
- US appeals court upholds Thomson Reuters' landmark win in AI training lawsuitreuters · Sep 29, 2026
- Appeals court upholds Thomson Reuters’ AI-training copyright win over ROSScryptopolitan · Sep 29, 2026
- US appeals court upholds Thomson Reuters' landmark win in AI training lawsuit - CNAchannelnewsasia.com · Sep 29, 2026
- US appeals court backs Thomson Reuters in landmark AI copyright dispute with Ross - CNBC TV18cnbctv18.com · Sep 29, 2026
- US appeals court upholds Thomson Reuters’ landmark win in AI training lawsuit By Reutersinvesting.com · Sep 29, 2026
- US appeals court upholds Thomson Reuters' landmark win in AI training lawsuit | Internationaldevdiscourse.com · Sep 29, 2026
- US appeals court upholds Thomson Reuters’ landmark win in AI training lawsuit | 1330 & 101.5 WHBLwhbl.com · Sep 29, 2026
- US appeals court upholds Thomson Reuters’ landmark win in AI training lawsuit | KELO-AMkelo.com · Sep 29, 2026
Machine-generated summary based on the titles and excerpts of the source articles. The source article is the authority for the facts. News monitoring, not legal advice.