AI summary
Written by AI from the official notes. Check them for exact details.OpenAI has launched new models, gpt-5.1-codex and gpt-5.1-codex-mini, optimized for coding tasks.
- New
gpt-5.1-codexandgpt-5.1-codex-minimodels introduced for coding tasks. - CLI and IDE Extension default to
gpt-5.1-codexon macOS and Linux. - Users can switch models using the
/modelcommand or dropdown menu. - Update
config.tomlto setgpt-5.1-codexas default for all sessions.
Why it matters: Developers using Codex for coding tasks should consider these new models for improved performance.
Full release notes
Along with the GPT-5.1 launch in the API, we are introducing new gpt-5.1-codex-mini and gpt-5.1-codex model options in Codex, a version of GPT-5.1 optimized for long-running, agentic coding tasks and use in coding agent harnesses in Codex or Codex-like harnesses.
Starting today, the CLI and IDE Extension will default to gpt-5.1-codex on macOS and Linux and gpt-5.1 on Windows.
If you have a model specified in your config.toml configuration file, you can instead try out gpt-5.1-codex 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-5.1-Codex from the dropdown menu.
If you want to switch for all sessions, you can change your default model to gpt-5.1-codex by updating your config.toml configuration file: