Official app
Start using
official Codex
We handle sign-up, sign-in, and the local config. What you run is always the official Codex app — not bundled, not modified.
Get started
Three steps
Download and install
Pick your platform. The official Codex app is installed separately — this tool does not bundle or modify it.
Sign in inside the app
Signing in writes the connection and local config. No service address or key to fill in.
Launch official Codex
Click Launch Codex to open the official app. Balance and top-ups live in your account.
Download
Download
Mac · Intel
Windows
FAQ
常见问题
No. It is an independent launcher that gets you onto the official Codex faster. After it writes the connection config, what you use day to day is the official Codex app itself.
No. The official app is left untouched. BestCodex only writes the connection config it manages, takes a backup first, and can restore the pre-takeover state at any time.
Gatekeeper is blocking an unsigned beta build; the app is not actually damaged. Move BestCodex to Applications, then run: xattr -cr "/Applications/BestCodex.app". If it still won't open, Control-click the icon and choose Open.