I don't know the details of their implementation, but in general, if the text is not watermarked, you will probably fail the test after a few tokens. If it is,

I don't know the details of their implementation, but in general, if the text is not watermarked, you will probably fail the test after a few tokens. If it is, you will have to run the entire text, or, you can just run it until you have some degree of confidence.