大模型chat/completions和completions区别解析

{
    "model": "text-davinci-003",
    "prompt": "Once upon a time, in a land far, far away,",
    "max_tokens": 100
}

{
    "id": "cmpl-5eU3oZz1w9Q8Jt3B3o5Q5Z5Z1",
    "object": "text_completion",
    "created": 1609459200,
    "model": "text-davinci-003",
    "choices": [
        {
            "text": " there lived a wise old owl who knew all the secrets of the forest...",
            "index": 0,
            "logprobs": null,
            "finish_reason": "length"
        }
    ],
    "usage": {
        "prompt_tokens": 10,
        "completion_tokens": 100,
        "total_tokens": 110
    }
}

{
    "model": "gpt-4",
    "messages": [
        {"role": "system", "content": "You are a helpful assistant."},
        {"role": "user", "content": "Who won the world series in 2020?"},
        {"role": "assistant", "content": "The Los Angeles Dodgers won the World Series in 2020."},
        {"role": "user", "content": "Where was it played?"}
    ]
}

{
    "id": "chatcmpl-5eU3oZz1w9Q8Jt3B3o5Q5Z5Z1",
    "object": "chat.completion",
    "created": 1609459200,
    "model": "gpt-4",
    "choices": [
        {
            "message": {
                "role": "assistant",
                "content": "The 2020 World Series was played at Globe Life Field in Arlington, Texas."
            },
            "index": 0,
            "finish_reason": "stop"
        }
    ],
    "usage": {
        "prompt_tokens": 50,
        "completion_tokens": 20,
        "total_tokens": 70
    }
}