ImageGenerationResponse

{
    "created": 0,
    "data": [
        {
            "b64_json": "string"
        }
    ],
    "output_format": "png",
    "usage": {
        "total_tokens": 0,
        "input_tokens": 0,
        "output_tokens": 0,
        "input_tokens_details": {
            "text_tokens": 0,
            "image_tokens": 0
        }
    }
}