ChatGPT Appears to Remember Incognito Sessions
awesome-alpaca-ace · reddit · 2026-07-19
A user reported frequently chatting with ChatGPT in an unauthenticated incognito window, but the model unexpectedly referenced their "long-running pokemon project" during a response about a to-do list—a project never explicitly mentioned in that session.
The user suspects this indicates either a coincidental hallucination or that ChatGPT might employ some form of cross-session persistence, device-level recognition, or personalization mechanism. They also noted being twice linked back to their own forum posts by ChatGPT, raising suspicions of "big data memory" or personalized tracking aimed at user retention.
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