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Configure Codex (ChatGPT app)

Orbit AI API Team2026/07/113 min read

For a Codex client that supports OpenAI-compatible APIs, point its Base URL to Orbit AI API and provide the key in a local environment variable.

Configure with AI Toolbox​

Add Orbit AI API as a custom Codex channel in AI Toolbox and configure its Base URL, API key, and model mapping. AI Toolbox can also switch between an official Codex account and custom channels.

1. Add a provider​

Create a Codex provider with Base URL https://orbitaiapi.site/v1 and an API key from the console.

Adding a Codex provider in AI Toolbox
Figure 1: Add a custom Codex provider.

2. Fetch models​

After saving, fetch the provider's available models to avoid entering a nonexistent or retired model name.

Fetching available Codex models in AI Toolbox
Figure 2: Fetch the models supported by the provider.

3. Select a model​

Select the model to use for Codex in the model mapping or model selection view.

Selecting a Codex model in AI Toolbox
Figure 3: Select a model for Codex.

4. Save and test​

After confirming that the provider and model are active, reopen Codex or the ChatGPT app and test the connection.

Completed Codex configuration in AI Toolbox
Figure 4: Codex configuration is complete.

Final checks​

Reopen Codex or the ChatGPT app and send a simple request. For an authentication error, check that the API key is correct, contains no spaces, and remains enabled.