Openai 图像生成响应

{
    "created": 1589478378,
    "data": [
        {
            "b64_json": "iVBORw0KGgoAAAANSUhEUgAABAAAAAQACAIAAADwf7zUAAA..."
        }
    ],
    "usage": {
        "input_tokens": 37,
        "input_tokens_details": {
            "image_tokens": 0,
            "text_tokens": 37
        },
        "output_tokens": 4160,
        "total_tokens": 4197
    }
}