ChatGPT's memory feature can remember facts about you and take earlier chats into account. You can turn it on, manage it and delete it in the settings under Personalization. For complex projects, multiple tools and AI agents, though, you need a specialized AI memory.
Does ChatGPT have a memory?
Yes. With its memory feature, ChatGPT can remember things about you, like your job, your writing preferences or that you're vegetarian. These memories flow into future conversations. ChatGPT can also refer back to earlier chats to make answers more personal.
ChatGPT memory works in the background: ChatGPT decides for itself what to remember. But you can also ask it explicitly: "Remember that …".
How to turn on and manage ChatGPT memory
You'll find the controls in Settings under Personalization. There you can:
- turn the memory feature on or off,
- decide whether ChatGPT may take earlier chats into account,
- view saved memories and remove individual ones.
The exact labels can change with updates, but the place in the settings usually stays the same.
How to delete ChatGPT memory
If you want ChatGPT to forget something, delete the memory in the overview of saved memories, one by one or all at once. Important: deleting a chat does not automatically remove the memories that came from it. For conversations that shouldn't go into memory at all, use a temporary chat.
Why ChatGPT still forgets
Many people wonder: "ChatGPT forgets things even though memory is on." There are reasons:
- Limited storage: The memory feature holds selected facts, not complete project knowledge.
- Context window: In very long chats, early content eventually falls out of the context window.
- No connections: Individual facts sit side by side, with no idea which belongs to which project.
- Tied to ChatGPT: Switch to Claude, Codex or another tool, and the memory stays behind.
When ChatGPT memory isn't enough anymore
For everyday personal use, ChatGPT memory is handy. But if you code with AI agents, steer projects or look after clients, you need more: a memory that knows decisions along with their reasons, learns from mistakes, understands connections and works across all tools.
That's what Hebby is for. Hebby is an AI memory modeled on the human brain: with its own graph memory, Hebbian learning and the ability to think ahead. And it isn't tied to one provider. It works with Claude Code, Codex and other agents.
Hebby Memories: the second brain for Claude Code, Codex & co. Learns as you work, thinks ahead, never forgets what matters. Get Early Access →
Frequently asked questions
How do I turn on memory in ChatGPT?
In the settings under Personalization, you can switch the memory feature on and off. That's also where you decide whether ChatGPT may take earlier chats into account.
How do I delete ChatGPT's memory?
Under Settings and Personalization, you can view saved memories and delete them one by one, or remove them all at once. For individual conversations without memory, there are temporary chats.
Why does ChatGPT still forget things?
The memory feature only keeps selected facts, in limited amounts. Long conversations also eventually overflow the context window. Project knowledge, connections and lessons from many sessions get lost along the way.