How to add Unquant to OpenCode

OpenCode takes any OpenAI-compatible endpoint as a custom provider. Add Unquant to your config and pick the model from OpenCode's model list.

Setup guide2 min readUpdated 1 October 2026

1
Set your key
```
export UNQUANT_API_KEY=your-unquant-key
```

Add the provider

In opencode.json in your project, or ~/.config/opencode/opencode.json for every project:

{
  "$schema": "https://opencode.ai/config.json",
  "provider": {
    "unquant": {
      "npm": "@ai-sdk/openai-compatible",
      "name": "Unquant",
      "options": {
        "baseURL": "https://api.unquant.io/v1",
        "apiKey": "{env:UNQUANT_API_KEY}"
      },
      "models": {
        "glm-5.3-flash": { "name": "GLM-5.3-Flash" },
        "qwen-3.8-flash-next": { "name": "Qwen 3.8 Flash Next" }
      }
    }
  }
}

3
Choose the model
Restart OpenCode, run /models and pick Unquant · GLM-5.3-Flash.

401

Unauthorized

Check UNQUANT_API_KEY is set where OpenCode runs.

403

Not included in your subscription

Pick the model on your plan.

429

Concurrent stream limit reached

Another request is still running on your account.