The Transformer is a neural-network architecture particularly useful for learning relationships in sequences with variable-length inputs or outputs, such as text documents. It is a dominant architecture for generative AI. section 1.1
Most current language models use similar Transformer architectures, but can differ in training, text representation, and how they are offered. Those differences can affect cost and output quality for a particular task. section 8.0
Variable-length text
A text document illustrates a sequence whose length can vary; GPT’s broader uses include summarizing documents and writing code. section 1.1



























