Guides·Codex

OpenAI Codex CLI

Codex ships with the ChatGPT plan you may already pay for, which makes it the cheapest serious terminal agent to try. These guides cover the install, the sandbox model, and the config that makes it useful.

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Codex

Use Continuum’s hosted inference in Codex CLI

A seven-line block in config.toml points the Codex CLI at Continuum’s OpenAI-compatible API, with every model on your plan available by ID.

Read guide →8 min Codex

OpenAI Codex CLI: the complete guide

Install, auth, sandbox modes, config.toml, and the flags that actually change behaviour.

Read guide →13 min Codex

How to use Codex inside Claude Code

OpenAI's official plugin makes Codex a callable worker inside Claude Code. Setup, rescue jobs, reviews, session transfer, and safe parallel work.

Read guide →7 min
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Every guide in this cluster

OpenAI Codex CLI: the complete guide Install, auth, sandbox modes, config.toml, and the flags that actually change behaviour. 13 min OpenAI Codex pricing: what it costs on every ChatGPT plan Included with the ChatGPT plan you probably already pay for. The ladder, the two meters, the credit rate card, and the API comparison. 7 min Install the Codex CLI: the installer, npm, or Homebrew Three install routes, the sign-in choice that decides your bill, and the one command that tells you whether any of it worked. 6 min Codex sandbox and approval modes explained properly Two orthogonal settings, the handful of pairings worth using, and the newer permission-profile system that replaces both. 7 min AGENTS.md: the file every coding agent reads The cross-tool convention, what belongs in it, how nesting works, and how to keep one file working for every agent you run. 6 min Codex config.toml: the complete reference Every setting worth changing, the profile system that replaced the old one, and MCP server configuration in the same file. 6 min Codex CLI commands and flags: the full reference Every subcommand, the flags worth memorising, the slash commands, and the two flags that were removed under people. 6 min How to use the Codex CLI: a working day with it First session to first merged change, with the habits that separate a useful agent from an expensive one. 6 min Codex CLI on Windows: native sandbox or WSL2 One PowerShell command to install, then a real decision: the native Windows sandbox or WSL2. Both explained, with the errors each one produces. 7 min Codex CLI on macOS: Homebrew, npm, and Seatbelt Three install routes and what each leaves on disk, how the Seatbelt sandbox actually behaves, and the macOS folders that break a sandboxed agent. 6 min Codex CLI on Linux: install, sandbox, and servers The install that works, the bubblewrap prerequisite nobody mentions, the Ubuntu AppArmor fix, and headless authentication. 6 min Codex CLI login: ChatGPT account or API key Two credentials that bill completely differently, where each one is cached, and how to sign in on a box with no browser. 7 min Updating the Codex CLI and pinning it in CI The self-update command, the per-route commands, and why a laptop and a pipeline want opposite policies. 6 min Codex on the web, in the app, and in your IDE Five surfaces with genuinely different reach. What each can see, what none of them do well, and how to choose in one question. 6 min Codex app vs Codex CLI: which to use, and when Same agent, same account, same config. The difference is supervision versus scriptability. 7 min The Codex app: what it is and how to get it It stopped being a separate download in July 2026. Where it went, how to get it, and what it is actually for. 7 min Codex in VS Code: the extension and the CLI The extension identifier, the editors it works in, and when the integrated terminal is still the better answer. 6 min Codex download: every install route in one place Four things are called "Codex". Which one you need, where it comes from, and the exact command for each. 6 min Codex and GitHub: reviews, mentions, and the Action Three different things share this query. The repository, the pull request reviewer, and the CI action, each done properly. 6 min How to use Codex inside Claude Code OpenAI's official plugin makes Codex a callable worker inside Claude Code. Setup, rescue jobs, reviews, session transfer, and safe parallel work. 7 min Use Continuum’s hosted inference in Codex CLI A seven-line block in config.toml points the Codex CLI at Continuum’s OpenAI-compatible API, with every model on your plan available by ID. 8 min
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