"The Tribune alleges that its lawyers contacted Perplexity in mid-October asking if the AI search engine was using its content, according to the complaint. Perplexity's lawyers replied it did not train models with the Tribune's work, but that it "may receive non-verbatim factual summaries," the lawsuit claims. The Tribune's lawyers, however, argue that Perplexity is delivering Tribune content verbatim. Interestingly, the newspaper's lawyers are also calling out Perplexity's Retrieval Augmented Generation (RAG) as a culprit."
"RAG is a method used to limit hallucinations by having the model only use an accurate or verified data source. The Tribune argues that Perplexity is using the newspaper's content in its RAG systems, scraped without permission. Plus, it alleges the Perplexity's Comet browser is bypassing the paper's paywall to deliver detailed summaries of those articles. The Tribune is one of 17 news publications from MediaNews Group and Tribune Publishing that sued OpenAI and Microsoft over model training material in April. That suit is ongoing."
Chicago Tribune filed a federal lawsuit in New York alleging that Perplexity used Tribune content without permission and delivered that content verbatim. Tribune contends Perplexity's lawyers told them the company did not train models on Tribune work but said Perplexity "may receive non-verbatim factual summaries." Tribune alleges that Perplexity uses scraped content within Retrieval Augmented Generation systems and that Perplexity's Comet browser bypasses the paper's paywall to provide detailed article summaries. The Tribune is among publishers pursuing legal action over AI training and retrieval practices, and Perplexity faces additional suits from Reddit and Dow Jones.
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