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OpenAI Codex

OpenAI's coding agent for the web, terminal and IDE, included with ChatGPT.

Vibe coderBuilder
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Beginner-friendly

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1/3 · Some setup needed

Free plan

Yes: Available on ChatGPT Free with limited usage (no fixed number published; check /status).

Checked on 2026-10-20

Last tested

Not hands-on tested yet

Official link: chatgpt.com/codex

Your first 10 minutes

  1. Sign in with your ChatGPT account.
  2. Open Codex on the web or install the CLI.
  3. Connect a GitHub repo or open a folder.
  4. Ask for a small task.
  5. Review the changes before merging.

Used in: 💻 Coding assistant