This Model Does Not Exist is a website that uses a generative adversarial network (GAN) to create realistic images that do not exist. The GAN is trained on a massive dataset of real images, and it learns to generate new images that are similar to the ones in the dataset. However, the GAN is also trained to distinguish between real and fake images, so it is able to create images that are so realistic that they look like they could have been taken from the real world.
The website is simple to use. You simply type in a description of the image you want to create, and the GAN will generate a new image. The descriptions can be as simple or as complex as you want. For example, you could type in "a cat sitting on a couch" or "a cityscape at night." The GAN will then generate an image that matches your description.