ChatGPT May Track Your Activity Across Other Sites, Report Says

The story first appeared on Hacker News, linking to a report on Buchodi that alleges ChatGPT is able to learn what users do on other websites via an ad‑collector tool embedded in the service. The claim suggests that data gathered for advertising purposes could be cross‑referenced with the conversational model, potentially revealing browsing patterns beyond the chat interface itself.

According to the article, the ad‑collector operates by inserting tracking pixels or scripts into the web pages where ChatGPT is accessed, capturing identifiers such as cookies or device fingerprints. These identifiers are then allegedly matched with OpenAI's user accounts, allowing the model to associate external site visits with a specific user’s chat history. The report does not provide technical details about the matching algorithm or the scope of data retained.

OpenAI has not publicly commented on the specific mechanism described, and the company’s official privacy policy states that it does not use personal browsing data to train its models unless users explicitly opt in. The lack of confirmation means the claim remains unverified, but it underscores ongoing debates about how AI services handle third‑party data and the need for clearer transparency from providers.

If the allegations prove accurate, the implication is that ChatGPT could personalize responses based on a user’s broader online activity, blurring the line between conversational AI and targeted advertising. Privacy advocates argue that such integration would require robust consent frameworks and clearer disclosures, while regulators may need to examine whether existing data‑protection laws cover AI‑driven cross‑site tracking.