1. No backup
Save your instructions and original files before you do anything. See exporting instructions.
2. Assuming Actions transfer
OpenAI states custom actions do not transfer through its migration. Plan their rebuild: Actions migration.
3. Editing after you migrate
After migration the original becomes read-only, so finish edits first and make later changes in the new version.
4. Assuming the same model and behavior
The selected model and capability settings do not carry over reliably, so answers can differ. Test with real questions.
5. Forgetting sharing and permissions
For plugins you need permission to share, and recipients install them. Check access before announcing.
6. Moving outdated files
Migration is the time to remove old material. Do not carry stale files forward.
7. No announcement
Update links, onboarding and saved resources so users find the new version.
Check your GPT before you move it
Paste your instructions, file names and Actions schema into the free checker. It runs in your browser and builds a portable bundle. Nothing is uploaded.
Open the free checkerRelated guides
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