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ARTICLE · 02 APRIL 2025

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First Decision Finding Copyright Infringement In Generative AI

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The first major decision on copyright liability in AI, Thomson Reuters v. Ross Intelligence, provides critical insight into how copyright laws will be applied in the context of generative AI training.

CanadaIntellectual Property
Gerald Kerr-Wilson
Gerald Kerr-Wilson
Christian Leblanc
Christian Leblanc
Eliane Ellbogen
Eliane Ellbogen
Isabelle Kalar
Isabelle Kalar
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The first major decision on copyright liability in AI, Thomson Reuters v. Ross Intelligence, provides critical insight into how copyright laws will be applied in the context of generative AI training. On February 11 2025, Judge Bibas of the Third Circuit for the District of Delaware ruled that Ross had infringed Thomson Reuters's copyright in Westlaw's legal headnotes that served to train Ross' AI legal research engine.

This bulletin delves into these key findings and offers a comparative analysis from a Canadian perspective. Those operating in the AI space should take note of this decision and its impact on using copyrighted materials to train AI systems.

Note that on March 18, 2025, Ross filed a motion for certification for interlocutory appeal (see here).

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