I ran across this helpful video explanation of how large language model systems are developed. ChatGPT and Claude and Gemini…. and so on that you hear about in the media are large language models – what passes for “AI” these days. It’s by Jacob Andreas of MIT CSAIL published in 2023. The explanation is light on details and does not assume a technical background. There are two youtube videos, a 16-minute part 1 and a 12-minute part 2.