Two different products
ChatGPT Plus is a monthly subscription for using ChatGPT on the website and in OpenAI’s apps. The OpenAI API is for other apps and developers. It has its own account page, its own keys and its own pay-as-you-go billing.
How to get an OpenAI API key
- Go to platform.openai.com/api-keys and sign in.
- Add credit under Billing.
- Click Create new secret key and copy it. It starts with
sk-. - In Nubi, open Connections, paste it and click Detect and connect.
Do you need to pay at all?
No. If you just want to try Nubi, a free Gemini key from Google is the simplest start. You can add OpenAI, Claude or OpenRouter later and let Nubi pick the best model for each task.
Updated 2026-10-11
