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Use your Claude Code or Codex

Already pay for Claude or ChatGPT? Coder runs Claude Code and Codex on your own login, so their work comes out of your plan, not out of anything we charge. You keep one chat, with the same keys, commands, and safety whichever agent answers.

1. Set up the agent once

Install the agent's own program and log in to it, on the same computer and as the same user that runs Coder (more).

Claude Code:

npm install -g @anthropic-ai/claude-code
claude

Codex:

npm install -g @openai/codex
codex

Log in when the program asks, then quit it (Ctrl+C). Coder never reads or sends your login; it only checks that you're logged in.

2. Start Coder

cd ~/code/my-project
coder

A new chat starts on Auto: Coder picks who answers from the agents that are on and logged in here. Once it has answered, the label at the input's top right says who, such as Auto → Claude (Haiku 5.5).

3. Pick the agent yourself

Before the chat's first message, press Shift+Tab to step through who can answer: Auto, Claude Code, Codex, OpenCode, then the other agents found on this computer. Stop on the one you want and send your message. A chat keeps its agent; press Ctrl+N for a new chat to switch.

You can also just say it: "use Codex for this".

4. Watch your plan's usage

Whenever a turn runs on your Claude or Codex plan, the label shows how much of that plan's usage windows you've used, such as 5h 12% · week 15%: 12% of the five-hour window and 15% of the weekly one. Auto skips an agent whose window has run out, and leans away from Claude Code when its five-hour window is nearly used up.

5. Use both

One chat can hand a piece of work to the other agent and keep going:

Have Codex review this change for bugs.

The other agent works in its own conversation, shown as a row under the input. Press Down to look at it and Esc to come back; its report joins your chat when it's done.

What stays the same

  • Your setup. Claude Code runs with your own settings and skills, and every agent reads your project's AGENTS.md and CLAUDE.md.
  • Your keys. Enter sends, Ctrl+Enter queues, and Esc stops, whichever agent answers.
  • Your safety. Deploys, merges, secrets, payments, and DNS changes wait for your yes or no on every agent. See Safety.

Turn one off

Type /plugins (or press Ctrl+P), choose Claude Code or Codex, and press Space. From a shell:

openagents coder plugins disable codex

Turn it back on with openagents coder plugins enable codex.

Other agents work the same way: Coder runs OpenCode, Grok Build, Devin CLI, and Cursor too, each on its own login. See Choose who answers.

Next: Pin a model or use Auto.