Now OpenAI is getting sued by the dictionary; Quartz, March 17, 2026

Quartz Staff, Quartz; Now OpenAI is getting sued by the dictionary

Encyclopedia Britannica and Merriam-Webster sued the ChatGPT maker, accusing it of copying almost 100,000 articles to train its AI models

"Encyclopedia Britannica and its subsidiary Merriam-Webster have filed suit against OpenAI, alleging that the ChatGPT maker copied their copyrighted content without authorization to train its large language models,

The lawsuit, filed in Manhattan federal court last week, alleges that OpenAI used close to 100,000 Britannica articles to train its models, and that ChatGPT responses frequently reproduce or closely paraphrase Britannica's reference content, including encyclopedia articles and dictionary entries. The complaint also alleges OpenAI uses a retrieval-augmented generation system to pull from Britannica's content in real time when generating responses."

The dictionary sues OpenAI; TechCrunch, March 16, 2026

Amanda Silberling, TechCrunch; The dictionary sues OpenAI

"Encyclopedia Britannica and Merriam-Webster have filed a lawsuit against OpenAI, alleging in its complaint that the AI giant has committed “massive copyright infringement.”

Britannica, which owns Merriam-Webster, retains the copyright to nearly 100,000 online articles, which have been scraped and used to train OpenAI’s LLMs without permission, the publisher alleges in the lawsuit.

Britannica also accuses OpenAI of violating copyright laws when it generates outputs that contain “full or partial verbatim reproductions” of its content and when the AI lab uses its articles in ChatGPT’s RAG (retrieval augmented generation) workflow. OpenAI’s RAG tool is how the LLM scans the web or other databases for newly updated information when responding to a query. Britannica also alleges that OpenAI violates the Lanham Act, a trademark statute, when it generates made-up hallucinations and attributes them falsely to the publisher."

Perplexity's definition of copyright gets it sued by the dictionary; Engadget, September 11, 2025

 Anna Washenko, Engadget; Perplexity's definition of copyright gets it sued by the dictionary

"Merriam-Webster and its parent company Encyclopedia Britannica are the latest to take on AI in court. The plaintiffs have sued Perplexity, claiming that AI company's "answer engine" product unlawfully copies their copyrighted materials. They are also alleging copyright infringement for instances where Perplexity's AI creates false or inaccurate hallucinations that it then wrongly attributes to Britannica or Merriam-Webster. The complaint, filed in New York federal court, is seeking unspecified monetary damages and an order that blocks Perplexity from misusing their content."