ChatGPT can now remember useful details between chats, making its responses more personalized and relevant. As you chat with ChatGPT – whether you’re typing, talking, or asking it to generate an image – it will remember helpful context from previous conversations, like your preferences and interests, and use that to tailor its responses. The more you use ChatGPT, the more useful it becomes. You'll start to notice improvements over time as it builds a better understanding of what works best for you. You can also teach ChatGPT something new by saying it in a chat — for example: “Remember that I am vegetarian when you recommend a recipe.” To check what ChatGPT remembers, just ask: “What do you remember about me?”

ChatGPT can also use memories to inform search queries when ChatGPT searches the web using third-party search providers. Learn more about search.

You’re in control of what ChatGPT remembers. You can delete individual memories, clear specific or all saved memories, or turn memory off entirely in your settings. If you’d like to have a chat without using or updating memory, use Temporary Chat. Temporary Chats won’t reference memories and won’t create new memories.

You can control Memory via two settings:

You can choose to turn on “Saved Memories,” both, or neither. The settings are flexible and you can change them anytime.

Saved memories are details you’ve directly told ChatGPT to remember. You can add a new memory at any time – for example: “Remember that I am vegetarian when you recommend a recipe.” Saved memories work similarly to custom instructions, except our models update them automatically rather than requiring users to manage them manually. If you share information that might be useful for future conversations, ChatGPT may save those details as a memory without you needing to ask. Like custom instructions, saved memories are part of the context ChatGPT uses to generate a response. Unless you delete them, saved memories are always considered in future responses.

ChatGPT can manage saved memories on its own, updating, combining, or removing them when asked. You’re in control of ChatGPT’s saved memories. You can delete individual memories, clear all of them, or turn saved memory off completely in settings. (Note: turning off “Reference saved memories” in settings also turns off “Reference chat history”). To chat without using saved memory, use Temporary Chat.

You can turn saved memories on or off anytime in Settings, under the Personalization section:

Turning saved memory off won’t delete anything that’s already been remembered. And deleting a chat doesn’t remove saved memory from that conversation. To delete saved memories, tell ChatGPT to delete or forget it, or go to “Manage memories” in Settings.

To fully remove something, delete both the saved memory in Settings and the chat where you originally shared it.

The “notepad” of your saved memories are stored separately from your chat history. This means even if you delete a chat, any saved memories from it can still be used in future conversations.

You can ask ChatGPT to forget a saved memory at any time. When you do, that memory is removed and won’t be used in future chats. We may retain a log of deleted Saved Memories for up to 30 days for safety and debugging purposes.

Saved memories can show up in past conversations. For example, if ChatGPT remembers that you live in San Francisco, it might say “Since you live in San Francisco…” when answering a weekend plan question. You can delete that memory anytime, but it won’t remove mentions from past chats. To clear that, you will need to delete the specific chat where it was shared.

There’s no storage limit for “Reference chat history”, but saved memories do have a limit. To check your saved memory usage, navigate to the Personalization section in Settings and click Manage under the saved memories subheading:

We will notify you when your storage is full. Once your memory storage is full, ChatGPT won’t save new memories until you clear space.

To free up space, you can delete saved memories. You can do this by asking ChatGPT to forget something, or by managing your memories in Settings. When you clear saved memories, you’ll see the updated storage reflected in the Personalization section of your Settings. Please note that deleted memories may continue to be referenced for a few days.

When “Reference chat history” is turned on, ChatGPT will reference your past conversations to recall useful information you’ve shared. It uses this to learn about your interests and preferences, helping make future chats more personalized and relevant. Like custom instructions, when this setting is on, relevant information from your past conversations may be added to new ones. Unlike saved memories, which are kept until you delete them, details from past chats can change over time as ChatGPT updates what’s more helpful to remember. Because ChatGPT doesn’t retain every detail from past chats, use saved memories for anything you want it to always remember.

You can turn “Reference chat history” on or off anytime in Settings under the Personalization section:

If you turn “Reference saved memories” off, that will also turn off “Reference chat history”. If “Reference saved memories” is on, you can still turn “Reference chat history” off.

If you turn off “Reference chat history”, this will also delete the information ChatGPT remembered from past chats. That information will be deleted from our systems within 30 days.

There is no storage limit for what ChatGPT can reference when “Reference chat history” is turned on.

To learn what ChatGPT remembers about you, just ask it. You can also ask ChatGPT to forget something it remembered from a past conversation. When ChatGPT forgets something, it won’t use that information in future responses, but the original conversation will still be in your chat history unless you delete it. It may take a few days for deleted memories to stop being referenced in your chats.

When “Reference chat history” is on, ChatGPT will keep information from past conversations unless you delete (or archive) those chats.

If you turn off “Reference chat history”, all information ChatGPT remembered from past chats will be deleted. That information will be deleted from our systems within 30 days.

If Memory is on and you want to fully remove something ChatGPT remembers, you will need to delete both the saved memories in Settings and the chat where you originally shared that information.

ChatGPT Enterprise workspace owners can turn Memory on or off for all users in their Admin Settings.

As of February 18th, 2025, memory capacity for Enterprise and Edu customers has increased by 20%.

Memory raises important privacy and safety considerations, especially around what type of information should be remembered and how that information is used.

We’re taking steps to reduce bias and have trained ChatGPT not to proactively remember sensitive information, like health details, unless you explicitly ask it to. We are continuing to improve how the model handles this type of information. You’re in control: you can review and delete saved memories, ask what ChatGPT remembers about you, delete specific conversations, and provide feedback so we can improve. If Memory is enabled, please avoid entering information you wouldn’t want remembered.

If you have the “Improve the model for everyone” setting turned on, we may use content you’ve shared with ChatGPT, including past chats, saved memories, and memories from those chats, to help improve our models. You can turn this setting off anytime in your Data Controls. As always, we do not train on content from ChatGPT Team, Enterprise, and Edu customers by default.

Learn more about your choices on how we use your content to improve model performance.

Some models may not currently support chat history - for example, as of today, the o1-pro and o3-mini models do not offer memory features for all users.