AI summary
Written by AI from the official notes. Check them for exact details.OpenAI has released the gpt-5-codex-mini model, a smaller and more cost-effective version of gpt-5-codex.
- New
gpt-5-codex-minimodel option available in Codex CLI and IDE Extension. - Model offers approximately 4x more usage under ChatGPT subscription.
- Automatic suggestion to switch to
gpt-5-codex-miniat 90% usage limit. - Users can select
gpt-5-codex-minifrom the dropdown menu in the IDE Extension.
Why it matters: Developers using Codex tools should consider this model for extended usage at a lower cost.
Full release notes
Today we are introducing a new gpt-5-codex-mini model option to Codex CLI and the IDE Extension. The model is a smaller, more cost-effective, but less capable version of gpt-5-codex that provides approximately 4x more usage as part of your ChatGPT subscription.
Starting today, the CLI and IDE Extension will automatically suggest switching to gpt-5-codex-mini when you reach 90% of your 5-hour usage limit, to help you work longer without interruptions.
You can try the model for a new Codex CLI session using:
You can also use the /model slash command in the CLI. In the Codex IDE Extension you can select GPT-5-Codex-Mini from the dropdown menu.
Alternatively, you can change your default model to gpt-5-codex-mini by updating your config.toml configuration file: