ImageResponse

{
    "created": 0,
    "data": [
        {
            "url": "http://example.com",
            "b64_json": "string",
            "revised_prompt": "string"
        }
    ],
    "background": "auto",
    "output_format": "png",
    "quality": "auto",
    "size": "string",
    "usage": {
        "input_tokens": 0,
        "output_tokens": 0,
        "total_tokens": 0
    },
    "model": "string"
}