What is AI memory?
AI memory is what an AI tool keeps between one chat and the next. The types, how ChatGPT, Claude and Gemini remember you, and when you need a separate memory.
Guide
Which AI has the best memory for work?
ChatGPT, Claude and Gemini all recall past chats once memory is on, but differ in what they let you see and edit. None shares its memory with the others.
If you work across more than one tool, the bigger question is where to keep what all of them need to know. This table compares the three as their official help pages describe them in October 2026.
Last reviewed:
How do ChatGPT, Claude and Gemini memory compare?
| ChatGPT | Claude | Gemini | |
|---|---|---|---|
| Recalls past chats | Yes, by referencing chat history | Builds memory from them; paid plans can also search them | Yes, with Memory on |
| See what it remembers | Memory summary and saved memories | A list of topics under Memory | Ask it what it used from past chats |
| Edit or delete | Yes, in memory settings | Yes, topic by topic | Correct it in chat, or delete the chats |
| Separate memory per project | Yes, with project-only memory | Yes, each project has its own | Not available in Gems |
| Imports memory from another tool | We found no import tool on OpenAI's help pages | Yes, as an experiment | Yes, memory and chat history |
| Memory reaches your other tools | No | No | No |
Checked in October 2026 against the official help pages: Memory in ChatGPT, Projects in ChatGPT, Use Claude’s chat search and memory, Import and export your memory from Claude, Memory of your past Gemini chats and Import from other AI platforms to Gemini Apps. Menu names change, so check there if an option is not where we say.
What to ask before you rely on a tool's memory
- Can I see what has been saved about me, and correct it myself?
- Does it keep my clients and projects apart?
- Does it stay with me if I change tools or use two?
- Can I keep a copy of it outside the tool?
The three tools answer the first two questions to different degrees, as the table shows. For the fourth, all three let you ask what they remember and copy it out. The third gets the same answer everywhere: each tool's memory works only inside that tool.
Why one tool's memory falls short when you use several
Each memory builds its picture from the chats held inside it. Agree a delivery date with a client in ChatGPT, then draft the proposal in Claude, and each tool now holds half the story.
Moving memory between them is a one-off snapshot that never updates. See what moves between AI tools and what stays behind.
Where Memory Bridge fits
Memory Bridge is one memory for your work that ChatGPT, Claude and the other tools you connect all read. It holds notes you can see in full and edit, each with its source and date, so you know which tool saved it and when.
Each tool's own memory keeps working as before; Memory Bridge adds what all your tools need. See how it works, or the four kinds of AI memory tools.
Common questions
Does Claude remember past conversations?
Yes, with memory on, and paid plans can search past chats. Details in Does Claude remember across chats?
Does Gemini remember past conversations?
Yes, with Memory on a personal Google account. Details in Does Gemini remember past conversations?
Should standing instructions go in ChatGPT memory or custom instructions?
Custom instructions, which apply to every chat. The difference between the three places is in memory vs custom instructions vs projects.
Is Gemini memory better than ChatGPT memory?
They differ in what they show you, how you delete things, and how privacy settings interact. The detailed comparison is in ChatGPT vs Gemini.
Keep reading
Compare before you choose
Comparisons of Memory Bridge with ChatGPT, Claude and Gemini memory, and with Mem0 and MemoryPlugin. What each option does, and what Memory Bridge adds.
How Memory Bridge works
Connect your tool, tell Memory Bridge about your work, then carry on. How your context is saved and how it comes back in every new chat and every tool.
One memory. Every tool you use.
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