FEATURE
Support specifying GPT-6-Astra via API without changing defaults or appearing in the picker
If you connect to Codex via API to run code, you can now specify the GPT-6-Astra model directly in your API calls. It will neither modify your everyday default model nor appear in the model picker (the menu for manually switching models). This allows backend scripts requiring a specific model to run smoothly without exposing the option to users selecting models in the interface.