There a great Wikipedia article which talk about it. Basically AI has always been used as a fluid term to describe forms of machine decision making. A lot of the times it’s used as a marketing term (except when it’s not like during the AI Winter). I definitely think that a lot of the talk about regulation around “AI” is essentially trying to wall off advanced LLMs to the companies who can afford to go through the regulation paperwork while making sure those who are pushing for regulation now stay ahead. However, I’m not so sure calling something AI vs LLMs will make any difference when it comes to actual intellectual property litigation due to how the legal system operates.