mirror of
https://github.com/openai/codex.git
synced 2026-05-23 12:34:25 +00:00
c0f7e1b99f
## Why After the terminal-probe work in #23175, fresh-session startup still waits for `thread/start` before the chat input can become usable. The chat widget already has the machinery to hold early submissions until a session is configured, so fresh `thread/start` does not need to stay on the input-ready hot path. Refs #16335. ## What This PR starts fresh app-server threads in a background task, reports completion through a startup app event, and attaches the primary session once `thread/start` returns. Resume and fork startup paths remain synchronous. ## Benchmark In the local pty startup benchmark, this PR's pre-optimization base branch, #23175, measured about 152ms median from launch to accepted chat input. The stacked result measured about 66ms median, for an approximate additional savings of 85-95ms. For broader context, the original `main` baseline before either startup optimization was about 250.5ms median. We also measured Codex 0.117.0 on the same machine at about 64.6ms median, so the stacked branch is back in the old-startup-time range. ## Stack 1. [#23175: [1 of 2] Optimize TUI startup terminal probes](https://github.com/openai/codex/pull/23175) — base PR 2. [#23176: [2 of 2] Start fresh TUI thread in background](https://github.com/openai/codex/pull/23176) — this PR ## Verification - `cargo test -p codex-tui`
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 want the desktop app experience, run
codex app or visit the Codex App page.
If you are looking for the cloud-based agent from OpenAI, Codex Web, go to chatgpt.com/codex.
Quickstart
Installing and running Codex CLI
Install globally with your preferred package manager:
# Install using npm
npm install -g @openai/codex
# Install using Homebrew
brew install --cask codex
Then simply run codex to get started.
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
- Apple Silicon/arm64:
- Linux
- x86_64:
codex-x86_64-unknown-linux-musl.tar.gz - arm64:
codex-aarch64-unknown-linux-musl.tar.gz
- x86_64:
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
Run codex and select Sign in with ChatGPT. We recommend signing into your ChatGPT account to use Codex as part of your Plus, Pro, Business, 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.
Docs
This repository is licensed under the Apache-2.0 License.