Is current AI sentient as the Terminator?

No, it's not as capable by a long shot.

It's hard to try to come up with a single measurement of capability---I suspect that if we had a really good one, we'd know more than we do about intelligence. But one can't reasonably call the current crop general intelligences. You can't just feed them arbitrary problems and have them learn to solve them and get better at doing so over time, the way humans can. They have quite limited ability to learn subsequent to their training phase.

EDIT: My own take is that while an artificial general intelligence might incorporate an LLM in some way, it won't be just an LLM. Like, my guess would be that we need foundational changes to how the things work to get there.

LLMs can do some neat things, and I'm sure that people will figure out more clever applications. But I don't believe that it'll be what we have today or a minor tweak to it or throwing more hardware at it that'll get us to general intelligence. Going to take more time with researchers advancing the field.