discriminators

Definition

The component that decides real versus fake, or which class an input belongs to. In GANs it is the generator's adversary; in ELECTRA it is the model actually kept, tasked with spotting substituted tokens. The word connects to the older discriminative-versus-generative distinction: a discriminator learns a decision boundary rather than the data distribution, which is why it is often the cheaper and more sample-efficient half of such a pair.