What ChatGPT, Claude, and Gemini Know About You – and How to Delete the Memory

AI chatbots such as ChatGPT, Gemini, and Claude employ memory features to store personal details about users, which are then used to tailor future responses. Users can discover what these tools have recorded simply by asking with a prompt, and even get the AI to reveal implied information such as estimated age. In a test, ChatGPT accurately summarized previously shared interests, usage habits, approximate location, occupation, and family details, as well as technical data like browser and operating system. A more advanced prompt can elicit 'blind spots'—insights into communication, behavior, or thinking patterns that the user may not have realized. The author's test revealed a preference for structured work but a tendency to underestimate surprises. To manage this data, users can start a new chat and instruct the chatbot to forget or update specific information. Additionally, each service offers settings to view and delete memory entries: ChatGPT under 'Personalization' > 'Memories', Gemini under 'Personal context' with options to clear activity, and Claude under 'Features' > 'Your memory files' with an option to delete all entries alongside disabling the feature.