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Agent IDE — Codex fork for AI-native development environment
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Lionel Cheng a6597a9958
Fix/correct reasoning display (#6749) 
This closes #6748 by implementing fallback to
`model_family.default_reasoning_effort` in `reasoning_effort` display of
`/status` when no `model_reasoning_effort` is set in the configuration.

## common/src/config_summary.rs

- `create_config_summary_entries` now fills the "reasoning effort" entry
with the explicit `config.model_reasoning_effort` when present and falls
back to `config.model_family.default_reasoning_effort` when it is
`None`, instead of emitting the literal string `none`.
- This ensures downstream consumers such as `tui/src/status/helpers.rs`
continue to work unchanged while automatically picking up model-family
defaults when the user has not selected a reasoning effort.

## tui/src/status/helpers.rs / core/src/model_family.rs

`ModelFamily::default_reasoning_effort` metadata is set to `medium` for
both `gpt-5*-codex` and `gpt-5` models following the default behaviour
of the API and recommendation of the codebase:
- per https://platform.openai.com/docs/api-reference/responses/create
`gpt-5` defaults to `medium` reasoning when no preset is passed
- there is no mention of the preset for `gpt-5.1-codex` in the API docs
but `medium` is the default setting for `gpt-5.1-codex` as per
`codex-rs/tui/src/chatwidget/snapshots/codex_tui__chatwidget__tests__model_reasoning_selection_popup.snap`

---------

Signed-off-by: lionelchg <lionel.cheng@hotmail.fr>
Co-authored-by: Eric Traut <etraut@openai.com>
2025-11-19 15:52:24 -08:00
.devcontainer chore: install an extension for TOML syntax highlighting in the devcontainer (#1650) 2025-07-22 10:58:09 -07:00
.github Update defaults to gpt-5.1 (#6652) 2025-11-17 17:40:11 -08:00
.vscode Move rust analyzer target dir (#5328) 2025-10-18 17:31:46 -07:00
codex-cli detect Bun installs in CLI update banner (#5074) 2025-10-14 17:49:44 +00:00
codex-rs Fix/correct reasoning display (#6749) 2025-11-19 15:52:24 -08:00
docs feat: arcticfox in the wild (#6906) 2025-11-19 16:31:06 +00:00
scripts fix: ToC so it doesn’t include itself or duplicate the end marker (#4388) 2025-11-05 14:52:51 -08:00
sdk/typescript feat(ts-sdk): allow overriding CLI environment (#6648) 2025-11-14 19:44:19 +00:00
.codespellignore feat: make it possible to toggle mouse mode in the Rust TUI (#971) 2025-05-16 16:16:50 -07:00
.codespellrc TypeScript SDK scaffold (#4455) 2025-09-29 13:27:13 -07:00
.gitignore nit: personal git ignore (#6787) 2025-11-17 17:45:52 +00:00
.npmrc chore: migrate to pnpm for improved monorepo management (#287) 2025-04-18 16:25:15 -07:00
.prettierignore [apply-patch] Clean up apply-patch tool definitions (#2539) 2025-08-21 20:07:41 -07:00
.prettierrc.toml Initial commit 2025-04-16 12:56:08 -04:00
AGENTS.md tests: replace mount_sse_once_match with mount_sse_once for SSE mocking (#6640) 2025-11-13 18:04:05 -08:00
CHANGELOG.md Documentation improvement: add missing period (#3754) 2025-10-30 13:01:33 -07:00
cliff.toml docs(changelog): update install command to @openai/codex@<version> (#2073) 2025-10-18 11:02:22 -07:00
flake.lock Fix nix build (#4048) 2025-10-17 12:19:08 -07:00
flake.nix Fix nix build (#4048) 2025-10-17 12:19:08 -07:00
LICENSE Initial commit 2025-04-16 12:56:08 -04:00
NOTICE resizable viewport (#1732) 2025-07-31 00:06:55 +00:00
package.json chore: subject docs/*.md to Prettier checks (#4645) 2025-10-03 11:35:48 -07:00
pnpm-lock.yaml [exec] Add MCP tool arguments and results (#5899) 2025-10-29 14:23:57 -07:00
pnpm-workspace.yaml TypeScript SDK scaffold (#4455) 2025-09-29 13:27:13 -07:00
PNPM.md fix: include pnpm lock file (#377) 2025-04-18 17:01:11 -07:00
README.md docs: add example config.toml (#5175) 2025-11-03 18:19:26 -08:00

README.md

npm i -g @openai/codex
or brew install --cask codex

Codex CLI is a coding agent from OpenAI that runs locally on your computer.

If you want Codex in your code editor (VS Code, Cursor, Windsurf), install in your IDE
If you are looking for the cloud-based agent from OpenAI, Codex Web, go to chatgpt.com/codex

Codex CLI splash

Quickstart

Installing and running Codex CLI

Install globally with your preferred package manager. If you use npm:

npm install -g @openai/codex

Alternatively, if you use Homebrew:

brew install --cask codex

Then simply run codex to get started:

codex

If you're running into upgrade issues with Homebrew, see the FAQ entry on brew upgrade codex.

You can also go to the latest GitHub Release and download the appropriate binary for your platform.

Each GitHub Release contains many executables, but in practice, you likely want one of these:

  • macOS
    • Apple Silicon/arm64: codex-aarch64-apple-darwin.tar.gz
    • x86_64 (older Mac hardware): codex-x86_64-apple-darwin.tar.gz
  • Linux
    • x86_64: codex-x86_64-unknown-linux-musl.tar.gz
    • arm64: codex-aarch64-unknown-linux-musl.tar.gz

Each archive contains a single entry with the platform baked into the name (e.g., codex-x86_64-unknown-linux-musl), so you likely want to rename it to codex after extracting it.

Using Codex with your ChatGPT plan

Codex CLI login

Run codex and select Sign in with ChatGPT. We recommend signing into your ChatGPT account to use Codex as part of your Plus, Pro, Team, Edu, or Enterprise plan. Learn more about what's included in your ChatGPT plan.

You can also use Codex with an API key, but this requires additional setup. If you previously used an API key for usage-based billing, see the migration steps. If you're having trouble with login, please comment on this issue.

Model Context Protocol (MCP)

Codex can access MCP servers. To configure them, refer to the config docs.

Configuration

Codex CLI supports a rich set of configuration options, with preferences stored in ~/.codex/config.toml. For full configuration options, see Configuration.

Docs & FAQ

License

This repository is licensed under the Apache-2.0 License.