This looks like a fake website. The creator of the website is claiming credit for the model, which does not appear to be created by him. The original model can be found here, along with the source code: https://huggingface.co/hexgrad/Kokoro-82M
Every popular machine learning paper has a fake website associated with it, for some reason. Can anyone figure out why? Another example, someone created this website https://imagen3.org, which is NOT Imagen3 by Google. However, it currently ranks #2 for the model name.