GPT is Generative Pre-trained Transformer, created by OpenAI, located in San Francisco and co-founded by Elon Musk. It can create computer code and write books. I became aware of GPT-3 (GPT-4 is the next release) when a question appeared on Quora: “How we will be able to tell the difference between GPT-4 writing and writing from an actual person?” If you want to read more about GPT, here is the Wikipedia link: en.wikipedia.org/wiki/GPT-3