Pixel resolution is half of original

The pixel resolution result is half the size of the original file. An example is the original is 6000 X 4000 and after running Denoise AI it is 3000 X 2000. I didn’t expect this at all. Am I doing something wrong?

Please take a screenshot of the processing parameters you are using and upload it using the up arrow in the header of the post you are making.

BTW the correct category can be found in the pull down at the top right of the box when you create a thread, please don’t use the Product Release category.