We don't know how sentient LLMs are. Nobody understands how they work. There's nothing concrete we can point to that guarantees LLMs don't start
"acting on their own".
LLMs are software programs. Waste no more time considering than an LLM is conscious than you would considering that a running copy of Microsoft Word is conscious.
There's a great article by author Ted Chiang discussing this in depth [1].
1. I hardly made an argument, merely stated a position.
2. "of sufficient complexity" is doing a lot of work here. Read Ted Chiang's article. I agree with him: there's nothing that prevents software from being conscious in principle. But there is also no reason to suspect that LLMs in particular are conscious based on very reasonable assumptions about what that would look like.
I find it hard to believe in something so ill-defined and with such heavy religious undertones.
I'm open to the dualist's position on consciousness if that's what you're really asking. Though that's more because I find the physicalist's position so untenable [1] that I'm forced to consider alternatives.