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opencode-openai-codex-auth

v4.4.0

Published

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

Vulnerabilities

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Links

Git

Maintainers

nummanalinummanali

Keywords

opencodeopenaicodexchatgptoauthgpt-5pluginauthchatgpt-pluschatgpt-pro

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:

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):

npx -y opencode-openai-codex-auth@latest --legacy
opencode run "write hello world to test.txt" --model=openai/gpt-5.2-medium

Uninstall:

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.