Codex

Codex is the Chat engine over the OpenAI Codex CLI (codex exec), in Chat - /chat?engine=codex.

What it does

Runs chat over the Codex CLI with a model picker, an approval-mode selector and a session browser, on top of the shared Chat / History / Workspace tabs and Settings panel.

Key actions

• Model picker - gpt-5.x-codex, o-series and related models (the list tracks your account).
• Approval-mode selector.
• Session browser.

Setup

Requires the OpenAI Codex CLI (codex). Check with command -v codex; install with npm i -g @openai/codex. Authenticate with codex login (a ChatGPT Plus/Pro subscription, no API key needed) or set OPENAI_API_KEY in .env.local. Codex also powers the AI Mastermind.

Tips

• Codex can be selected as the global model in the top bar.
• In S-Forge, the Codex CLI also serves as a no-cost image engine (OpenAI image_gen and code-drawn SVG boards).

See also

• Chat - the window this engine answers in.

• Models overview

• Model Manager