CNN has filed a lawsuit against AI startup Perplexity in a New York federal court, alleging that the company systematically copies its journalism without permission or compensation. The complaint, filed on Thursday, claims that Perplexity's AI tools generate verbatim reproductions of CNN articles and provide users with access to content that should be locked behind CNN's paywall. The lawsuit highlights that Perplexity ignored CNN's technical efforts to block its unidentified web crawlers. CNN asserts that while humans spend significant time researching, writing, and editing original content, Perplexity extracts this work to train its models and answer user queries. As a specific example, the lawsuit notes that prompting Perplexity's AI search tool with the title of a CNN article, What's next for Minneapolis? A shaky promise, mounting tensions and the fight for control, resulted in the AI returning substantial, word-for-word portions of the original reporting. This legal action places CNN alongside a growing list of media and intellectual property owners suing Perplexity for copyright infringement. Other plaintiffs include The New York Times, Encyclopedia Britannica, Merriam-Webster, and News Corp, which owns The Wall Street Journal. Perplexity is also currently facing litigation from Amazon and Reddit over similar allegations of unauthorized data scraping. The conflict appears rooted in failed negotiations regarding content licensing. In October 2025, CNN and Perplexity were discussing a deal to offer CNN content through Perplexity's Comet Plus subscription service. However, negotiations collapsed in November when the two parties could not agree on several critical issues, specifically limits on how Perplexity could utilize CNN content in its AI-generated answers. Following the breakdown, CNN rescinded the agreement and sent a formal letter demanding that Perplexity cease using its content and trademarks without authorization. The lawsuit claims Perplexity did not respond to this demand. Perplexity, which offers an AI-powered answer engine and an AI browser called Comet, has defended itself by maintaining that facts cannot be copyrighted. In a statement, spokesperson Jesse Dwyer told reporters, You cannot copyright facts, implying that the data used to generate answers is not subject to the same protections as original expression. CNN is seeking monetary damages and a permanent injunction to block what it describes as unlawful conduct. The case underscores the ongoing legal and ethical tensions between legacy media organizations and AI developers regarding data ownership, fair compensation, and the boundaries of using copyrighted material to train generative models. As the technology evolves, the outcome of this lawsuit and similar cases may set significant precedents for the future of digital journalism and artificial intelligence.