Hi, so basically both AI and a software are block of codes. AI i.e., Artificial intelligence is an imitation of human intelligence system in machines. Artificial Intelligence is a part of software since Artificial intelligence is itself a block of codes or software that does a particular work.

AI is a very vast field that contains the concept of Machine Learning, Data Science etc.

AI is very advance technology and big software companies are working on it even alot of companies use AI in their systems.

Hope this is helpful.