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  • License MIT

OpenAI ChatGPT (Codex backend) OAuth auth plugin for opencode - use your ChatGPT Plus/Pro subscription instead of API credits

Package Exports

  • opencode-openai-codex-auth
  • opencode-openai-codex-auth/dist/index.js

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (opencode-openai-codex-auth) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

Image 1: opencode-openai-codex-auth

Curated by Numman Ali Twitter Follow npm version Tests npm downloads One install. Every Codex model. Install · Models · Configuration · Docs

💡 Philosophy

"One config. Every model." OpenCode should feel effortless. This plugin keeps the setup minimal while giving you full GPT‑5.x + Codex access via ChatGPT OAuth.

┌─────────────────────────────────────────────────────────┐
│                                                         │
│  ChatGPT OAuth → Codex backend → OpenCode               │
│  One command install, full model presets, done.         │
│                                                         │
└─────────────────────────────────────────────────────────┘

🚀 Quick Start

npx -y opencode-openai-codex-auth@latest

Then: bash opencode auth login opencode run "write hello world to test.txt" --model=openai/gpt-5.2 --variant=medium Legacy OpenCode (v1.0.209 and below): bash npx -y opencode-openai-codex-auth@latest --legacy opencode run "write hello world to test.txt" --model=openai/gpt-5.2-medium Uninstall: bash npx -y opencode-openai-codex-auth@latest --uninstall npx -y opencode-openai-codex-auth@latest --uninstall --all

📦 Models

  • gpt-5.2 (none/low/medium/high/xhigh)
  • gpt-5.2-codex (low/medium/high/xhigh)
  • gpt-5.1-codex-max (low/medium/high/xhigh)
  • gpt-5.1-codex (low/medium/high)
  • gpt-5.1-codex-mini (medium/high)
  • gpt-5.1 (none/low/medium/high)

🧩 Configuration

  • Modern (OpenCode v1.0.210+): config/opencode-modern.json
  • Legacy (OpenCode v1.0.209 and below): config/opencode-legacy.json

Minimal configs are not supported for GPT‑5.x; use the full configs above.

✅ Features

  • ChatGPT Plus/Pro OAuth authentication (official flow)
  • 22 model presets across GPT‑5.2 / GPT‑5.2 Codex / GPT‑5.1 families
  • Variant system support (v1.0.210+) + legacy presets
  • Multimodal input enabled for all models
  • Usage‑aware errors + automatic token refresh

📚 Docs

  • Getting Started: docs/getting-started.md
  • Configuration: docs/configuration.md
  • Troubleshooting: docs/troubleshooting.md
  • Architecture: docs/development/ARCHITECTURE.md

⚠️ Usage Notice

This plugin is for personal development use with your own ChatGPT Plus/Pro subscription. For production or multi‑user applications, use the OpenAI Platform API.

Built for developers who value simplicity.