[gentoo]

I don't think anything about high-performance GPT models is standard, since they are only a couple years old and only a handful of organizations have developed them

[soulofmischief]

The technique in question has little to do with GPT itself; it involves using ML to generate more training data in an automated fashion, creating a generative training loop, which as another commenter mentioned, is also the basis behind general adversarial networks.