By D4ch1au One install. Every Codex model. Install · Models · Configuration · Docs

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💡 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.         │
│                                                         │
└─────────────────────────────────────────────────────────┘

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🚀 Quick Start

npx -y opencode-codex-auth@latest

Then:

opencode auth login
opencode run "write hello world to test.txt" --model=openai/gpt-5.3-codex --variant=medium

Legacy OpenCode (v1.0.209 and below):

npx -y opencode-codex-auth@latest --legacy
opencode run "write hello world to test.txt" --model=openai/gpt-5.3-codex-medium

Uninstall:

npx -y opencode-codex-auth@latest --uninstall
npx -y opencode-codex-auth@latest --uninstall --all

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📦 Models

• gpt-5.4 (none/low/medium/high/xhigh, 1M context window)
• gpt-5.3-codex (low/medium/high/xhigh)
• 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)

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🧩 Configuration

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

Minimal config is intended for smoke testing only; for stable GPT-5.x variants and presets, use the full configs above.

✅ Features

• ChatGPT Plus/Pro OAuth authentication (official flow)
• Multi-account support: add multiple ChatGPT accounts and rotate automatically on rate limits/auth failures
• 31 model presets across GPT‑5.4 / GPT‑5.3 Codex / 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
• Account Manager shows remaining percentage when Codex rate-limit headers are available

🔄 Multi-Account Rotation

Add accounts by running login multiple times:

opencode auth login
opencode auth login
opencode auth login

The plugin stores account pool state in:

• ~/.opencode/codex-auth-accounts.json

Runtime strategy is configured in:

• ~/.opencode/codex-auth-config.json

Example:

{
  "codexMode": true,
  "accountSelectionStrategy": "sticky",
  "rateLimitCooldownSeconds": 900,
  "authFailureCooldownSeconds": 270,
  "maxAccountsPerRequest": 1
}

Available strategies:

• sticky (default): keep using last successful account until it cools down or fails
• round_robin: rotate through eligible accounts

Account Manager

View and manage your logged-in accounts with an interactive TUI.

Via opencode auth login (recommended):

Select "Manage Accounts" from the login method list to open the account manager panel directly within OpenCode.

Via CLI:

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

The panel shows each account's status (active, cooldown, disabled, expired), last used time, and lets you:

• Enable/disable individual accounts
• Clear cooldown timers
• Delete accounts
• View detailed account info (token expiry, failure count, cooldown remaining)

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📚 Docs

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

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⚠️ 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.