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Codex ChatGPT Web: Use Your ChatGPT Plan in OpenAI Codex Without API Billing
An unofficial desktop launcher that routes ChatGPT Web models into OpenAI's Codex CLI, so your existing ChatGPT subscription covers coding sessions without spending Codex API credits.
Codex ChatGPT Web is an unofficial desktop launcher that adds ChatGPT Web models to the native model picker of Codex, OpenAI's coding agent CLI. When a ChatGPT Web model is selected in Codex, requests go through the user's existing ChatGPT subscription rather than the Codex API quota. The README states: 'Use the ChatGPT Web models available on your account, including Pro, from Codex's native model picker—with ChatGPT Web's separate usage limits, without spending your Work or Codex quota.' Available models depend on the account tier: Free and Go accounts receive Luna and Think; accounts with reasoning controls receive Instant through High, with Extra High and Pro available when the account exposes them. Full harness mode connects ChatGPT to the current task's files, terminal, and tools through MCP, so conversations stay tied to the Codex task. The launcher includes its own browser and runtime; no separate Chrome, Node, or Bun installation is needed. The app supports macOS 13 or later, Windows x64, and Linux x64.
Why a vibe-coder should care
For people who use both Codex and a ChatGPT subscription, this tool removes the double billing. The separate usage limits mean ChatGPT Web responses do not count against the Codex API quota.
How to install
Copy this and send it to your agent — Claude Code, Codex, any of them:
Install the ChatGPT Web launcher for Codex from https://github.com/miuuyy/codex-chatgpt-web — download the right installer for my system, follow the README, launch the app and sign me into ChatGPT in the embedded browser, then add the models to Codex; ask if you need help with any step.
Runs on a regular laptop — macOS 13 or later, Windows, or Linux; nothing extra to install.
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