Using ChatGPT Go API Key with gpt-5.1-codex API Model

[Jose_Seeron_A]

Hi all,

I’m currently working with the ChatGPT Go API key. I’d like to know if the ChatGPT Go API key can be used to get responses from the gpt-5.1-codex model using API.

Streaming: True
API: v1/responses

[_j]

Thanks for sharing your willingness to explore new experiences with your Go plan. I like watching people Go, as a gateway to more adventurous things they can do.

However, none of the ChatGPT subscription plans you pay for monthly include API credits or API services. The API is a separate product, unconnected to ChatGPT, and where you are billed by the exact model usage.

The first step in understanding is a review of pricing for model usage. Pricing | OpenAI API

Then, that you must prepay for services, setting up an organization and purchasing credits for use.

FAQ: Getting started with the OpenAI API: Quickstart, billing, verification, prepayment, credits, '429' errors

The Quickstart before OpenAI’s Quickstart Welcome to the OpenAI Developer Community, a site for connecting with fellow AI enthusiasts and consumers of API-based AI products. You are probably not here as your first stop in learning or for pre-sales questions, but instead, you might have found the developer site only after encountering challenges in getting started on the API. I mean to collect and clarify all the information you’d want to know about the API… the preface that should come before e…

The API currently does have its own version of gpt-5.1-codex, which can be used on the “Responses” API endpoint, or with API key authentication in the Codex software.