To get an AI assistant to remember your preferences, first turn on its memory or personalization feature, then state the preferences you want it to use and check what the assistant actually saved. The controls vary by product and account: ChatGPT separates saved memories from information drawn from chat history, while Gemini’s past-chat personalization has specific account and activity requirements.
Choose preferences worth remembering
Memory works best for stable guidance that improves many conversations, such as your preferred response length, units, writing style, or dietary requirements. Be specific and direct: “Remember that I prefer concise answers with metric measurements.” Treat that as a request, not a guarantee that every product will save the wording exactly as entered.
Avoid sharing sensitive information unless you understand the assistant’s controls and are comfortable with its data handling. OpenAI notes that sensitive information may appear in ChatGPT memory if you share it in a conversation.
Set up memory in ChatGPT
- Open ChatGPT and go to Settings > Personalization > Memory.
- Review the controls available in your account. Depending on the experience, you may see settings for Memory, saved memories, reference to chat history, a memory summary, or memory management.
- Turn on the relevant feature, then tell ChatGPT a preference you want it to use. For example: “Remember that I prefer concise answers with metric measurements.”
- Inspect the memory summary or management controls, if available, and correct or delete inaccurate information.
ChatGPT’s controls can vary by plan, region, platform, and workspace settings. OpenAI’s Memory in ChatGPT guide describes the available controls and how to manage them.
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Saved memories, chat history, and custom instructions
Saved memories are details you explicitly ask ChatGPT to remember or that it saves as useful context. Reference to chat history is different: it draws on relevant information from earlier conversations, but it is not a complete record of everything you have said. As OpenAI puts it, “Memory does not retain every detail from every conversation.” Information drawn from chat history can also change as ChatGPT updates what it considers useful.
Custom instructions provide another way to give direct guidance about what ChatGPT should know and how it should respond. They are distinct from saved memories and chat-history reference; use the option that best fits whether you want persistent instructions or remembered details.
Set up personalization in Gemini
Google documents Gemini personalization based on past Gemini chats, connected Google app content, and preferences for how Gemini should respond. Availability is limited; the cited guidance excludes work, school, and supervised accounts.
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Check eligibility for past-chat memory
To use personalization based on past Gemini chats, Google says you must be at least 18 and use a personal Google Account with Keep Activity turned on. Some experiences, including Gems and Live chats, are not supported for this feature. Supported surfaces and availability can change, so check Gemini’s current personalization settings and Google’s past-chat personalization guidance for the latest details.
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- In Gemini, open the current Personal Intelligence or personalization settings.
- Turn on memory of past chats if the option is available for your account.
- State the preference you want Gemini to use, then review its settings and relevant activity to check what information is available.
- To find or delete past chats, use Gemini Apps Activity. Google says deletion can take a short time to stop affecting personalization.
Deleting chats alone may not remove information that Gemini can access through a connected app. Google’s separate overview of personalization in Gemini Apps explains the different sources personalization can use.
Check why an assistant is forgetting a preference
If a preference does not seem to stick, check these in order:
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- Account: Make sure you are signed in to the account where you set the preference.
- Availability and settings: Confirm that memory or personalization is available for your account and enabled. A plan, region, platform, workspace policy, or account type can affect access.
- Clarity: State the preference plainly and explicitly ask the assistant to remember it.
- Saved information: Inspect the memory controls or ask the assistant what it remembers, if the product supports that. Correct an inaccurate entry through the available controls.
- Conversation mode: Check whether the chat is in a mode that does not create or use persistent memory.
Memory is not a promise that every detail will carry over to every conversation or mode. Chat-history personalization may select only relevant information; Gemini also documents unsupported experiences for past-chat memory.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Correct or remove something the assistant remembers
Turning off a memory feature, deleting a conversation, and deleting a separately stored memory can be different actions. Use the product’s memory controls to remove the saved item itself, and check whether the original conversation or another connected source also needs attention.
ChatGPT
Deleting the conversation where a memory was shared does not necessarily delete the separate saved memory. For full removal, OpenAI instructs users to delete both the memory and the chat where it was first shared, and to remove the information from other relevant sources such as files or connected apps. Changes may take time to propagate. See OpenAI’s memory management instructions for the current controls.
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For a conversation that should not create or update memory, ChatGPT offers Temporary Chats. Before starting one, choose whether it can use existing memories; saving a Temporary Chat converts it to a regular chat. Check the current settings because the choice about using existing memories is made before the conversation begins.
Gemini
Google says you can turn past-chat memory on or off in Gemini settings and find or delete past chats through Gemini Apps Activity. Deleting a chat may take a short time to stop affecting personalization, and information available through a connected app may remain available independently of the deleted chat. Review both the activity and connected-app access relevant to the information you want removed.
What to compare across assistants
Before relying on an assistant to carry preferences between conversations, check how its system works rather than assuming all products store information alike.
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Quick Recap
| Question | Why it matters |
|---|---|
| What can it use? | It may rely on explicit saved details, earlier chats, connected apps, or direct instructions. |
| Who can use it? | Eligibility may depend on account type, age, plan, region, or workplace settings. |
| Where does it work? | Some chat modes or product surfaces may not support personalization. |
| How do you inspect or correct it? | Look for controls that show, edit, or delete the information being used. |
| What does switching it off do? | Disabling use of memory may not erase stored information or remove it from other sources. |
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