401 Model opencode-go/GLM-5.1 not supported

### Question

After configuring the model, I was prompted that the model is unavailable. Here is my configuration file.And I already buy onepcode-go API.
{ 
 "provider": "opencode-go", 
 "base_url": "https://opencode.ai/zen/go/v1", 
 "api": "openai-completions", 
 "api_key": "", 
 "model": { 
 "id": "opencode-go/GLM-5.1", 
 "name": "GLM-5.1" 
 } 
}