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POLICY & REGULATIONOpenAI2026-03-16

Encyclopedia Britannica Sues OpenAI for Copyright Infringement and Trademark Violations

Key Takeaways

  • ▸Britannica alleges OpenAI used its copyrighted content at scale for model training and that ChatGPT reproduces verbatim excerpts from Britannica articles
  • ▸The lawsuit includes trademark infringement claims, asserting that ChatGPT falsely attributes hallucinated content to Encyclopedia Britannica
  • ▸OpenAI defends its use of training data as fair use of publicly available information, while Britannica seeks an injunction to prevent future violations
Sources:
Hacker Newshttps://www.engadget.com/ai/encyclopedia-britannica-sues-openai-for-copyright-and-trademark-infringement-164747991.html↗
Hacker Newshttps://www.reuters.com/legal/litigation/encyclopedia-britannica-sues-openai-over-ai-training-2026-03-16/↗

Summary

Encyclopedia Britannica has filed a lawsuit against OpenAI, alleging copyright and trademark infringement related to the training and operation of ChatGPT. The encyclopedia company claims that OpenAI illegally used its copyrighted content "at a massive scale" to train its AI models and that ChatGPT sometimes reproduces full or partial verbatim excerpts from Britannica's articles in user responses. Additionally, Britannica alleges that ChatGPT generates false or hallucinated content and falsely attributes it to the encyclopedia, violating its trademark rights. The lawsuit seeks an injunction to prevent OpenAI from continuing these practices, though no specific monetary damages amount was specified.

OpenAI responded to the allegations by emphasizing that ChatGPT is trained on publicly available data and grounded in fair use principles, arguing that the technology helps advance human creativity, scientific discovery, and medical research. This lawsuit adds to OpenAI's growing legal challenges, as the company is already defending itself against a major copyright infringement case filed by The New York Times. Britannica has also demonstrated its commitment to protecting its intellectual property by filing a similar lawsuit against AI company Perplexity in September.

  • This represents the second major copyright lawsuit Britannica has filed against an AI company, following similar action against Perplexity in September
Large Language Models (LLMs)Regulation & PolicyEthics & BiasPrivacy & Data

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