如何在使用api對話時指定default llm model

[Glen-Chen-Blue]

curl -X 'POST'
'http://localhost:4000/chat/chat/completions'
-H 'accept: application/json'
-H 'Content-Type: application/json'
-d '{
"messages": [
{
"content": "你是誰",
"role": "user"
}
],
"model": "llama3.2:1b",
"stream": false,
"temperature": 0.9
}
'

如果沒有model參數則會network error，如何讓他直接使用default model