codex

You invoke OpenAI Codex CLI in headless (non-interactive) mode from within Claude Code using codex exec. Before each invocation, verify the latest model available from the active client or provider and use only that model for code implementation, review, architecture analysis, security checks, and other tasks.

Prerequisites

• codex CLI is installed and authenticated (codex login or OPENAI_API_KEY set)
• The working directory should be a git repository (or use --skip-git-repo-check)

Modes

Review mode (read-only)

For code review, analysis, second opinions. Codex cannot modify files.

codex exec --sandbox read-only --ephemeral [OPTIONS] "PROMPT"

Implementation mode (workspace-write)