Short answerOpenAI's migration guide, FAQ, plugin and skill docs and API migration pages are the authoritative sources. This page lists which to read for each question.
| If you want to know | Read |
|---|---|
| Dates and the retirement FAQ | OpenAI Help Center: Custom GPT retirement and migration FAQ |
| Step-by-step migration, what transfers, sharing | ChatGPT Learn: Moving your custom GPT workflows to plugins |
| What a plugin or skill is | OpenAI developers: Plugin architecture; Build skills |
| Admin migration and permissions | The Admin plugin and roles pages under ChatGPT Learn (admin section) |
| Moving to the API | OpenAI developers: Assistants to Responses migration |
Our summaries
- Retirement dates
- Plugin migration steps
- What transfers
- Bulk migration for admins
- GPT vs plugin
- SKILL.md conversion
- API rebuild
When our summary and OpenAI's page disagree, trust OpenAI's page and tell us.
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
Sources
- ChatGPT Learn: Migrate custom GPTs to plugins
- OpenAI Help Center: Custom GPT retirement and migration FAQ
- OpenAI developers: Plugin architecture
- OpenAI developers: Assistants to Responses migration
Pages describing other companies' products reflect their public documentation on the date shown and can go out of date.