GeneratedImage does not return Usage and Model

[Alerinos]

Service

OpenAI

Describe the bug

GeneratedImage should return Usage number of tokens. As with ChatCompletion.
Here the json response from the request api:

{
    "created":  1745709995,
    "data":  [
                 {
                     "b64_json":  "***"
                 }
             ],
    "usage":  {
                  "input_tokens":  22,
                  "input_tokens_details":  {
                                               "image_tokens":  0,
                                               "text_tokens":  22
                                           },
                  "output_tokens":  272,
                  "total_tokens":  294
              }
}

        var client = new ImageClient(model: model.Name, apiKey: ApiKey);

        ImageGenerationOptions options = new()
        {
            Quality = GeneratedImageQuality.High,
            Size = GeneratedImageSize.W1792xH1024,
            Style = GeneratedImageStyle.Vivid,
            ResponseFormat = GeneratedImageFormat.Bytes
        };

        GeneratedImage image = await client.GenerateImageAsync(prompt, options);

OS

Win

.NET version

.net 8

Library version

latest