If you have a llm, then you have something to have a conversation with.
If you give the llm the ability to have memory, then it gets much "smarter" (context window and encoded local knowlege base)
If you give the llm the ability to offload math problems to an orchestrator that composes math problems then it can give hard numbers based on real math.
If you give a llm the ability to use the internet to search then it has a way to update its knowledgebase before it answers (seems smarter)
If you give a llm a orchestrator that can use a credit card on the internet, it can deliver stuff via doordash or whatever. (I don't trust it).
Definitely not general intelligence, but good at general conversation and brainstorming and able to get extended modularly while keeping the conversational interface