miuuyy/codex-chatgpt-web

Use ChatGPT Web (including Pro) as a native model in Codex — with context, tools, streaming and images, without using Codex quota.

What it solves

It allows users to integrate ChatGPT Web models (including Pro and reasoning models) directly into the Codex workflow. This enables users to leverage their existing ChatGPT account plans and usage limits without consuming their separate Codex or Work quotas, while maintaining a native interface and streaming capabilities.

How it works

The project uses unofficial browser automation to connect Codex to the ChatGPT web interface. It includes its own browser and runtime to avoid external dependencies. It offers three primary modes:

  • Browser-only: Automatic messaging without local tool access.
  • Full harness: Connects ChatGPT to local files, terminals, and tools via the Model Context Protocol (MCP) and an OpenAI tunnel-client.
  • Zero Risk: A manual mode where users paste prompts and send them manually to avoid automated page operation.

Who it’s for

Developers and power users of Codex who want to use the latest ChatGPT Web models (like GPT-6 Sol or GPT-5.6 Sol) and integrate them with their local development environment and tools.

Highlights

  • Native Integration: Accesses ChatGPT Web models through the Codex model picker.
  • Tool Connectivity: Full harness mode enables ChatGPT to interact with local files and terminals via MCP.
  • Flexible Context: Supports various context windows, including experimental 3x context for GPT-5.6 and larger context for GPT-6 Sol.
  • Cross-Platform: Provides installers for Windows, macOS (Intel and Apple Silicon), and Linux.

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