What Commonly Breaks When You Migrate a Custom GPT

Automated migrations are never perfect. Watch these areas.

Actions

Endpoints, schemas and auth may not carry over cleanly.

Tone and rules

Instructions can behave differently on a new setup, so compare answers side by side.

Sharing

Check who can access the new version.

Files

Retrieval behavior can differ, so retest questions that depend on your documents.

The checker flags these before you start.