Blog · Last checked 16 October 2026
How to Make ChatGPT Remember Things (and What It Will Always Forget)
Short answer: turn on Memory in Settings > Personalization > Memory, then say "Remember that..." for anything you want kept. For things ChatGPT must use every single time, such as your job, your tone or your rules, don't rely on memory. Put them in custom instructions, a project or a skill.
Can ChatGPT remember previous conversations?
Yes, partly. With Memory on, ChatGPT can draw on saved memories, past chats, your custom instructions and, depending on your plan and region, files and connected apps (OpenAI). But OpenAI is clear that Memory "does not retain every detail from every conversation". ChatGPT decides what's relevant, and what it has picked up from past chats can change over time.
So it will often remember that you're vegetarian. It won't reliably remember the exact way you like a client report laid out.
How do I make ChatGPT remember something?
- Open Settings > Personalization > Memory and check Memory is on. The exact options vary by plan, region and device (OpenAI).
- In any chat, say it plainly: "Remember that I work in HR at a 40-person company and write for non-specialists."
- Check it worked: ask "What do you remember about me?" OpenAI suggests exactly this (OpenAI Academy).
- Fix anything wrong by telling it, or by editing the memory in settings.
OpenAI's own tip is to save recurring context, such as your role, common projects and preferences, rather than one-off details (OpenAI Academy).
Why does ChatGPT forget things I told it?
Four common reasons:
- It was never saved. Mentioning something isn't the same as a saved memory. Say "remember that".
- Chat history is picked over, not stored whole. Details from past chats can change as ChatGPT updates what it thinks is useful (OpenAI).
- You were in a temporary chat. Temporary chats don't create or update memories.
- It judged it wasn't relevant. ChatGPT doesn't search your history for every reply, only when it thinks it will help.
Memory, custom instructions, projects or a skill: which should I use?
| Option | What it's good for | How reliable |
|---|---|---|
| Memory | Small facts that build up over time: family, diet, ongoing projects | Helpful but selective; ChatGPT chooses what to use |
| Custom instructions | Who you are and how you like answers, in every chat | Applied to all new chats; 1,500 characters on Free and Go, 5,000 on paid plans (OpenAI) |
| A project | One area, like "Work" or "House move", with its own instructions and files | Instructions apply inside that project (OpenAI) |
| A skill | A specific job done your way: reports, emails, meal plans | You write it once and paste or install it; it works in other AIs too |
The rule of thumb: memory for facts, instructions for rules. If getting it wrong would annoy you, write it down as an instruction rather than hoping it's remembered.
Do Gemini and Claude remember things too?
Yes, with their own settings. Gemini can personalise answers from past chats and your saved instructions, but only on a personal Google account, not work or school accounts, and not everyone has it yet (Google). Claude has memory across conversations, while searching past chats needs a paid plan (Anthropic). Each one remembers separately, so if you use more than one AI, a written set of instructions is the only thing that travels with you.
Is it safe to let ChatGPT remember personal details?
Be choosy. Whatever you share can end up in memory, and on personal accounts your chats may be used to improve models unless you turn off "Improve the model for everyone" in Data controls (OpenAI). Don't save health details, passwords, bank details or anything about other people that they wouldn't want stored. Use a temporary chat for sensitive one-offs.
What's the quickest way to stop repeating myself?
Write the important things down once as instructions. MakeASkill asks you a few quick questions and turns your answers into a ready-to-paste set of instructions for whichever AI you use. It's free and takes about two minutes. Make your skill now
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