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Wire · regulatory

US appeals court upholds Thomson Reuters' landmark win in AI training lawsuit

29 September 2026 · By · Wire by Fusion42

Published

29 September 2026

Topic

regulatory

◆ Sectors

AI & ML

◆ Geography

United States

◆ Source

Read at reuters.com →

◆ Verified

Fusion42 · 29 September 2026 · Fusion42 review

A US appeals court upheld Thomson Reuters' copyright win against Ross Intelligence for unauthorized use of Westlaw content to train an AI legal search engine, rejecting Ross' fair use defence in a landmark AI training case.

This Wire brief sits within Fusion42's coverage of AI & ML, and 7 sources have reported it between 29 Sep 2026 and 2 Oct 2026.

◆ ◆ The Wire takeaway

You face tighter copyright limits on AI training data after Thomson Reuters won a crucial case against Ross Intelligence. Adjust your AI model training plans now to avoid costly litigation over intellectual property.

◆ Coverage

7 sources · first reported 29 Sep 2026 · latest 2 Oct 2026

◆ Topics

AI & MLcopyrightai-traininglegal-techintellectual-propertyfair-use