codex-chatgpt-web README

The project's README from github.com/miuuyy/codex-chatgpt-web. As one markdown file: README.md.

Switch to web models. Stay in Codex. Your ChatGPT plan. Your workflow. Maximum capabilities.

Windows · x64  macOS · Apple silicon  Linux · x64

macOS Intel · All releases

English · 简体中文 · 日本語 · 한국어

A live ChatGPT Web turn using the native Codex harness

Get started · What’s new · Architecture · Troubleshooting

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. Keep the same interface, tasks, images, and streaming.

Full harness mode connects ChatGPT to the current task’s files, terminal, tools, and approvals through MCP. Conversations stay tied to your Codex task, so you can keep working as the context grows.

Get started

Available models: Free/Go → Luna / Think. Paid accounts → GPT-6 Sol and GPT-5.6 Sol, with Instant–High, plus Extra High and Pro when available. Each version has its own entry; existing GPT-5.6 chats keep GPT-5.6. Availability depends on your account and workspace.

  1. Install the launcher using the download for your system above.
  2. Sign in to ChatGPT in the embedded browser and run the browser smoke test.
  3. Install models and restart Codex once. In automatic mode, choose a model ending in (Web). Pro versions have separate entries; Sol reasoning is selected through Effort. Zero Risk keeps its dedicated entry.
  4. For coding with tools, open MCP in the launcher and complete the Full harness setup below.

The app includes its browser and runtime. No separate Chrome, Node, or Bun installation is needed.

Terminal install, updates & repair

Quit the launcher before updating. These installers select the platform and architecture, verify the published checksums, and preserve your ChatGPT profile and launcher settings.

macOS / Linux

curl -fsSL https://github.com/miuuyy/codex-chatgpt-web/releases/latest/download/install-launcher.sh | sh

Windows PowerShell

irm https://github.com/miuuyy/codex-chatgpt-web/releases/latest/download/install-launcher.ps1 | iex
Models, modes & MCP setup

Automatic modes offer Luna/Think when the account has no reasoning selector; otherwise Instant–High, with Extra High and Pro available independently when exposed by the account.

Mode Sending messages Local Codex tools
Browser-only Automatic No
Full harness (With Automation) Automatic Yes, through MCP
Zero Risk Paste and send manually Yes, through a separate MCP connector

Zero Risk does not read or operate the ChatGPT page. Choose the model and Codex Zero Risk connector yourself, paste and send the prepared prompt, then confirm Sent in the launcher. Automatic models ending in (Web) expose their supported Effort choices in Codex. Instant and each Pro version have separate entries to preserve their context budgets; older saved model entries keep their original fixed mode.

Full harness

Full mode connects ChatGPT's tool calls back to the current Codex task through the official OpenAI tunnel-client. The tunnel is outbound: it does not expose a public IP, open an inbound port, or require router forwarding.

The launcher's MCP page guides the complete setup. For the exact clicks, see the video walkthroughs.

Limits

See Limits for the current ChatGPT message allowances for GPT-5.6 Sol Pro and GPT-6 Astra. Context limits depend on the account type and selected effort. Plus Medium/High uses a measured 90,000-token window. GPT-5.6 supports up to 270,000 tokens with experimental 3× context enabled, with native Codex compaction supported throughout.

GPT-6 Sol supports Bigger Context at Medium, High and available Extra High: 120,000 tokens on Plus, with compaction at 110,000, and 240,000 on Pro, with compaction at 220,000. GPT-6 Instant uses standard context. GPT-5.6 and GPT-6 Pro keep their existing Bigger Context limits.

  1. Finish the required setup, open MCP, create the Tunnel and regular API key, then press Connect harness.
  2. Enable ChatGPT Developer Mode and create a new Tunnel connector named exactly Codex Native2, with Authentication: None and Allow all actions.
  3. Run Verify runtime to confirm that Codex Native2 is attached and available.

Write/modify actions also require the ChatGPT workspace and its administrator policy to permit them. See developer mode and MCP apps. Unexpected approval prompts fail closed unless --auto-approve-tool-calls is explicitly enabled; that option clicks Allow once, never a permanent grant.

Diagnostics & subagents

Use Activity for safe local diagnostics and Settings → Run doctor for end-to-end health. Settings can also cancel a retained browser turn or remove the Codex integration before uninstall. Save chats in ChatGPT keeps task conversations in ChatGPT history. Off by default; independent of New browser chat for each turn. Set CODEX_CHATGPT_WEB_BROWSER_DIAGNOSTICS=1 only when every browser checkpoint needs a screenshot.

New installs use Compatibility V1 for cross-backend subagents. Native preserves Codex's own feature settings and enables plaintext Web-to-Web V2 delegation. Restart Codex and start a new task after changing the protocol:

codex-chatgpt-web subagents status
codex-chatgpt-web subagents compatibility-v1
codex-chatgpt-web subagents native
Requirements & security

  • This is unofficial browser automation, not an OpenAI API. ChatGPT UI changes can break selectors; drift fails explicitly instead of silently switching model or transport.
  • Browser state is a sensitive login artifact, and the loopback listener is reachable by processes running as the same local user. Never share the launcher profile; use a trusted workstation.
  • Release packages currently target macOS 13+ (arm64/x64), Windows x64, and Linux x64. Runtime, tests, and packaging are gated on all three in CI; account-bound browser and MCP flows use the separate release validation.
  • Builds are not yet platform-signed, so Gatekeeper or SmartScreen may warn. The installers verify the published SHA-256 manifest before installation.

Read the complete architecture and security model before enabling full mode. Report vulnerabilities through SECURITY.md.

Temporary Chat is a ChatGPT privacy mode; prompts are still processed by OpenAI.

Validation coverage: release validation.

This is independent software and is not affiliated with or endorsed by OpenAI. Use it only with your own account and in accordance with applicable Terms of Use and workspace policies; it does not bypass authentication or access controls.

Run from source & develop 

git clone https://github.com/miuuyy/codex-chatgpt-web.git && \
cd codex-chatgpt-web && \
bun run app

This source path requires Bun 1.4.0. The command installs locked dependencies and opens the app.

bun run app
bun run dev:launcher
bun run src/cli.ts dev status
bun run dev:chat compaction-lab "Reply with exactly: DEV READY"
bun run verify
bun run smoke:subagents
bun run app:package

dev:launcher uses a separate profile and account under ~/.codex-chatgpt-web-dev. dev:chat exercises the real browser and compaction paths with explicit simulated tool results, without changing your normal Codex route. See the DEV chat harness for setup and commands.

Star History

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Troubleshooting · Security · Contributing · MIT license · CI

Also by me: ChatGPT Persona Voice — local, near-real-time custom voices for ChatGPT and Codex.

codex-chatgpt-web (miuuyy/codex-chatgpt-web)

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14.4K ·GitHub
Codex-chatgpt-web
What is this?A desktop launcher that lets Codex use ChatGPT Web (including Pro) as a native model, piping task context, images, tools, and streaming output through a browser-based ChatGPT Temporary Chat instead of the Codex API.
Is this a plugin inside Codex, or a separate app that bridges to it?It is a standalone cross-platform launcher app that runs an embedded browser session and bridges it to Codex's model picker over MCP, while Codex keeps its native task UI, context, and tool harness.
How do I get ChatGPT Web showing up in Codex's model picker?Install the desktop launcher with the macOS/Linux or Windows PowerShell command, sign in inside the launcher's embedded browser, run the browser smoke test, then press Install models and restart Codex to pick a ChatGPT Web model.
Do I need an OpenAI API key or extra software installed first?No model API key is required, and you don't need Chrome/Chromium, Node, or Bun on the system for the packaged launcher; running from source instead requires Bun 1.4.0.
What's the catch — is this an official OpenAI integration?No, it's unofficial browser automation, so if ChatGPT's UI changes, selectors can break; the project fails explicitly in that case instead of silently switching model or transport, and release builds aren't yet platform-signed so Gatekeeper/SmartScreen may warn.
Which operating systems does the launcher actually support?Release packages target macOS 13+ (arm64/x64), Windows x64, and Linux x64, and all three are gated in CI.
Does using this put my ChatGPT account at risk, and where does my data go?Browser login state is a sensitive artifact that should stay on a trusted workstation, and Temporary Chat is only a privacy mode — your prompts are still sent to and processed by OpenAI under its Temporary Chat policy, not run locally.
What are the three operating modes — Browser-only, Full harness, Zero Risk?Browser-only gives you ChatGPT models with no local tool access; Full harness (With Automation) lets every effort, including Pro, use the current Codex task's filesystem, shell, and tools via MCP; Zero Risk keeps the full Codex harness but has you manually copy, paste, and send the prepared prompt, removing any browser-automation account risk.
Does this actually save my Codex quota?Yes — it routes the selected model turn through a ChatGPT Web Temporary Chat instead of the Codex API, so it runs without consuming Codex quota, though your ChatGPT account's own message limits for that model tier still apply.
What is the 'Codex Native2' connector for?It's a ChatGPT Developer Mode Tunnel connector (created with Authentication: None, Allow all actions) that must be named exactly 'Codex Native2' so Full harness mode can route ChatGPT's tool calls back into the running Codex task over the official OpenAI tunnel-client.
Can a free ChatGPT account use this, or do I need Plus/Pro?Free/Go accounts only see the 'Luna' model tier, Plus accounts get Instant through High effort, and Pro accounts additionally unlock Extra High and Pro effort — the launcher auto-detects which tiers your signed-in account exposes.
What are similar projects?reticle, chat-on-steroids, OmniRoute, newsjack, holaOS, mixdog, cc-haha, rowboat
Which topics is it in?free-ai, bun, playwright, gpt, browser-automation, chatgpt, electron, artificial-intelligence, coding-agent, desktop, openai, codex
Creator
miuuyy
Size
26.8 MB
Stars
14.4K
Updated
CommitOct 17Releasev6.1.10Oct 17
Age
2mo
Commits · 90 Days