Observed Signal · Jul 28, 2026 · Policy Update · Source: t3n · Impact: 2/5 · Sentiment: Negative
Chatbots remember personal details — control their memory
The article reports that major chatbots — ChatGPT, Gemini and Claude — use memory functions to store personal details users share and reuse them to personalize future responses. Simple prompts can often make these saved items visible, including explicitly shared and implicitly inferred information (location, profession, family, estimated age, usage habits) and technical signals (browser, operating system, device). It shows each service’s controls for viewing, editing, disabling or deleting memories: ChatGPT (Settings → Personalization → Memories), Gemini (Settings → Personal context and activity history), and Claude (Settings → Features → Your memory files). The piece demonstrates models can reconstruct sensitive context from prompts, warns of privacy risks, and notes that deleting an account may not permanently remove memories unless stored entries are deleted first.
Memory features in major LLM-based chatbots affect what personal user data is stored and how it can be accessed or deleted; this has implications for user privacy, data availability for personalization, and potential regulatory or trust impacts relevant to advertising and data-driven services.
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Key Takeaways & Evidence Grounding
- ChatGPT, Gemini and Claude use memory functions to store and reuse personal details to personalize responses.
- A simple prompt can reveal stored and implicitly inferred information, including location, profession, family, estimated age and usage habits.
- Technical signals (browser, operating system, device) transmitted during use can enable the model to identify a user’s environment.
- Each service provides controls to view, edit, disable or delete memories: ChatGPT (Settings → Personalization → Memories), Gemini (Settings → Personal context and activity history), Claude (Settings → Features → Your memory files).
- Deleting an account may not permanently erase stored memories; users should delete memory entries explicitly to remove them.
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ChatGPT, Gemini, Claude Memory: How to Delete Stored Data
The article from t3n.de discusses the memory functions of AI chatbots ChatGPT (OpenAI), Gemini (Google), and Claude (Anthropic), explaining how these tools store personal details from conversations and use them to personalize responses. It highlights privacy concerns and provides a detailed guide on how users can access, manage, and delete this stored information. The guide includes specific prompt examples to reveal hidden assumptions, as well as step-by-step instructions for disabling memory features within each platform's settings. The article emphasizes that while deleting the entire account may not be enough, users can individually remove memory entries or turn off the feature altogether to better control their data.
ChatGPT's memory knows more about you than you think
OpenAI's ChatGPT has significantly enhanced its memory feature, automatically storing and organizing user information such as interests, preferences, and long-term goals without explicit commands. The 'Dream' function, introduced in June, helps process and contextualize memories, allowing the chatbot to understand temporal context like past events. However, this automatic memory can lead to incorrect assumptions, such as misclassifying users based on temporary searches, raising privacy concerns. Users can manage their memory via the 'Personalisierung' (Personalization) tab, where they can enable/disable the feature, view and edit the AI-created profile, or delete all memories, while past conversations remain intact. Temporary chats offer a privacy-safe mode that does not save any information. This guide provides step-by-step instructions for managing ChatGPT's memory effectively, balancing convenience and privacy.
Google Adds Memory Function to Gemini Chatbot
Google has rolled out a Memory feature for its Gemini chatbot in Germany, called "Gemerkte Informationen," enabling the model to store details from user conversations (preferences, likes/dislikes) and use them to provide more personalized responses. The capability was first announced in August 2025 and previously released in select regions; it is now available locally. The memory feature is enabled by default but can be turned off in the Gemini app under the "Personal Context" / "Gemerkte Informationen" settings. Google also introduced import tools to help users migrate remembered data and chat histories from other chatbots: a prompt-based copy/paste workflow and a ZIP upload for chat logs. The rollout complements Google's earlier Personal-Intelligence feature that integrates Gemini with Google apps.
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