Move your custom GPT before 11 December
Custom GPTs become plugins. Instructions and knowledge move; custom Actions do not. Source: OpenAI’s Custom GPT retirement FAQ, 11 Sep 2026.
26 Oct 2026Enterprise workspaces stop creating new custom GPTs (planned)
11 Dec 2026Custom GPTs retire on every plan and leave the GPT directory
11 Feb 2027Retirement for Enterprise workspaces with an approved deferral
What moves to the plugin
| In the GPT | In the plugin | State |
|---|---|---|
| Instructions | A skill inside the plugin | Carries over |
| Knowledge files | Reference files in the skill; retrieval can differ | Check |
| Conversation starters | Do not transfer; save them as starter prompts | Check |
| Selected model | Does not carry over; workspace defaults apply | Check |
| Custom Actions | Do not transfer; rebuild as an MCP server | Action needed |