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

What it does
Section titled “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
Section titled “Key actions”- Model picker — gpt-5.x-codex, o-series and related models (the list tracks your account).
- Approval-mode selector.
- Session browser.
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.
- 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_genand code-drawn SVG boards).
See also
Section titled “See also”-
Chat — the window this engine answers in.