How can I select a custom GPT created by myself?

[Monica_Stavi]

How can I select a custom GPT created by myself?

Hello friends,

I didnt find a possibilty to select a custom GPT in n8n. This is kinda sad because I have created one just for my stuff.

Is there any solution for this?

Kind regards

[moosa]

hey @Monica_Stavi check this response out, this might help.

Is it possible to use custom GPT models?

Hi @marco_chainels Thanks for posting here and welcome to the community! Unfortunately these custom GPT models are only available within OpenAI. However, what you could try, is to set up an OpenAI Assistant that uses your custom model and then interact with it in n8n via our OpenAI node (Message Assistant)

[Monica_Stavi]

Hey @moosa - thanks for you kind reply!

can you explain further what you mean and how this is going to work? Unfortunately I didnt get it

And I’ve clicked on your like. There it says

*After achieving feature parity in the Responses API, we’ve deprecated the Assistants API. It will shut down on August 26, 2026. Follow the guidance below to update your integration. Learn more.
*
So is this still working or is it already outdated?

kind regards

[moosa]

well that post is from n8n team member and says custom gpts are only accessible within openai platform.
So according to that you can not access them outside openai platform.

can you explain how you created one?
because you can tune models inside n8n also with system prompt or giving vector store or access to different platforms.