Let for the sake of argument, assume that the LLM is truly sapience. Then this would be the first alien intelligence we have ever encountered. All life and intelligence we have seen before were organic, carbon-based life, including the most distant and unintuitive ones like the cephalopods, cetaceans, and primates. Even now we are still arguing whether these creatures are intelligent or they are just "not there" yet. We refuse to acknowledge their higher reasoning capacity regardless of evidences like rudimentary communication, social structure, tool use, etc. And these are things sharing >70% similarity to us.
An LLM is so different and alien we would literally incapable of imagining their thought process even if they are pummeling us with evidences of their intelligence. It is just how it is. So I think it is futile and even foolish to try to quantify or create criteria for "intelligence" when discussing AI. Let it be and accept it for what it is: something we humans have created that can do lots of stuff.