The way some people confidently assert that we will never create AGI, I am convinced the term essentially means "machine with a soul" to them. It reeks of religiosity.
I guess if we exclude those, then it just means the computer is really good at doing the kind of things which humans do by thinking. Or maybe it's when the computer is better at it than humans and merely being as good as the average human isn't enough (implying that average humans don't have natural general intelligence? Seems weird.)
When we say "the kind of things which humans do by thinking", we should really consider that in the long arc of history. We've bootstrapped ourselves from figuring out that flint is sharp when it breaks, to being able to do all of the things we do today. There was no external help, no pre-existing dataset trained into our brains, we just observed, experimented, learned and communicated.
That's general intelligence - the ability to explore a system you know nothing about (in our case, physics, chemistry and biology) and then interrogate and exploit it for your own purposes.
LLMs are an incredible human invention, but they aren't anything like what we are. They are born as the most knowledgeable things ever, but they die no smarter.