GPT Migrator
Troubleshooting, testing and FAQs

How long does Custom GPT migration take?

Last checked October 18, 2026
Short answerIt depends on complexity. A prompt-only GPT can move quickly. Files add cleanup and testing. Actions add the most work because they must be rebuilt and tested. We do not quote fixed hours because we have no verified benchmarks.

What drives the time

FactorEffect
Instructions onlySmallest job: copy, adjust, test
Knowledge filesGather, clean, upload, retest document questions
ActionsLargest job: inventory, rebuild, authorize, test
Number of usersSharing, access and announcements
Testing depthCustomer-facing bots need more checks

Plan the work in phases

  1. Backup and inventory.
  2. Rebuild instructions and files.
  3. Rebuild connections.
  4. Test and fix.
  5. Switch users.

Leave extra time before OpenAI's retirement date; see the dates. The checklist helps you track each phase.

Not sure it is simple enough to do yourself?

Tell us what your GPT does, whether it uses Actions and how many files it has. We will say what will break and what a rebuild involves. The audit is free.

Request a free audit

Related guides

Sources

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