格式应该是符合 OpenAi 规范了. 
入参: 
{
    "model": "Claude-Sonnet-4",
    "messages": [{"role": "user", "content": "What is the advantage of Rust programming language?"}],
    "api_key": "xxxx",
    "stream": true
}

流式回参: 
{
    "id": "chatcmpl-eb4a96d35ed348d687caaf24522fffa5",
    "object": "chat.completion.chunk",
    "created": 1748582403,
    "model": "Claude-Sonnet-4",
    "choices": [
        {
    ...