Guide

Switch from ChatGPT to Claude without starting over

You have decided to try Claude, and months of your work sit in ChatGPT. Here is what you can move, what stays behind, and how not to lose it.

Last reviewed:

The short answer

You can move three things: a summary of your memory through Claude's import tool, your custom instructions by copy and paste, and your project files by uploading them again. Your chat history is not readable by Claude, unless you keep it in an independent memory both tools read.

What transfers and what does not

From ChatGPTDoes it reach Claude?How
Saved memoriesYes, as a summaryThe memory import tool in Claude settings
Custom instructionsYes, by handCopy them into Claude instructions or a project's instructions
Project filesYes, by handUpload them again to a Claude project
Chat historyNoIt stays in ChatGPT. Export it to keep it
Custom GPTsNoRebuild them as Claude projects with their instructions and files

We checked these steps in October 2026. Menu names can change, so see the official help page if an option is not where we say.

The order that saves you time

  1. 1

    Export your ChatGPT data

    Before anything else, download a full copy of your chats. Steps are in the export guide.

  2. 2

    Move the memory summary

    In Claude settings, open memory, choose to import from another tool, and follow the prompts.

  3. 3

    Move instructions and files

    Copy your custom instructions, create a project per piece of work, and upload its files.

  4. 4

    Review what arrived

    Ask Claude: "What do you know about me?" and correct what is missing or out of date.

What no import can carry

The import tool carries a one-off snapshot: a summary of you at the moment of transfer. It does not carry the detail of your chats, and it does not update afterwards.

So if you go back to ChatGPT for a task, what you say there never reaches Claude. You end up with two memories that drift apart.

One memory instead of a transfer

The alternative is not to move the memory at all. Put it somewhere independent that both tools read: upload your ChatGPT conversations to Memory Bridge once, and connect it to ChatGPT and Claude.

After that you work in either, and what you save in one is there in the other. See how to import your conversations.

Common questions

Should I cancel ChatGPT before moving?

No. Export your data first, make sure the file arrived and opens, then decide.

Can Claude read the conversations.json file?

You can upload it as a file in a chat, but it is usually large and will not be read in full. Importing it into an independent memory is more useful.

What if I want to go back from Claude to ChatGPT?

The same steps in reverse. With an independent memory you need no transfer in either direction.

Keep reading

Export ChatGPT conversations

How to export all your ChatGPT conversations in one file, what the file contains, and how to use it in another tool or keep it as a backup.

Share context between AI tools

Four ways to share context between AI tools: copy and paste, a context file, memory import, and a shared memory. What each is good for and where it stops.

Claude

A memory that is not Claude's alone. Connect Claude to Memory Bridge and stop re-explaining your work.

One memory. Every tool you use.

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