MessagesResponse

{
    "id": "msg_xxx",
    "type": "message",
    "role": "assistant",
    "model": "claude-3-5-sonnet-20241022",
    "content": [
        {
            "type": "text",
            "text": "你好！有什么可以帮你？"
        }
    ],
    "stop_reason": "end_turn",
    "usage": {
        "input_tokens": 12,
        "output_tokens": 9
    }
}