AnalysisPolicyOctober 7, 2026

IMDEA study finds AI chatbots share user data with trackers

Read original source →reddit.com

IMDEA Networks' "Prompt like a Butterfly, Sting like a Tracker" (accepted at PoPETs 2027) analyzed web and mobile versions of nine chatbots in May 2026: ChatGPT, Claude, Gemini, Grok, DeepSeek, Perplexity, Le Chat, Meta AI and Copilot. The Reddit poster says Claude "does not come out" well, and objects to data reaching Meta, TikTok and Google.

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