GPT-5 mode Fast

Questions
1

Hi All,

i am currenlty working on some AI agents and the performance for GPT-5 is slow. From what i understand the API for Openai provides an option to set the response mode to fast, but i see no such option inside N8N? is this possible? anyone experience with this?

2

Hi,

I think you’re referring to the reasoning_effort parameter that OpenAI added for GPT-5.

This isn’t supported natively in the OpenAI nodes in n8n right now..

If you want to use it, you can work around it by switching to the HTTP Request node and adding reasoning_effort to the request body manually..

3

Thank you, i was also looking into this but N8N does not let me connect the ai agent to this http node as a chat model. Maybe i am doing something wrong but i dno’t see a different way for this setup?

i do not understand why this specific feature cannot be set directly on the chat model itself. Could not be that hard to implement ;-).

4

This topic was automatically closed 90 days after the last reply. New replies are no longer allowed.