Introducing GPT-5-Codex-Mini

Introducing a new GPT-5-Codex-Mini model option to Codex CLI and the IDE Extension. The model is a smaller and more cost-effective version of GPT-5-Codex that provides up to 4x more usage as part of your ChatGPT subscription.

Starting today, Codex in both the CLI and IDE Extension will automatically offer to switch to GPT-5-Codex-Mini when you reach 90% of your 5-hour usage limit to help you work longer without interruptions.