> If a less intelligent species, like humans, is able to create a more intelligent species

I think we have yet to even show that this might be true, so let's cross that bridge first.

OK, that's an unusual definition. I think it depends on where the plateau is . If it's just something smarter than humans are capable of being, that might be possible (imagine a being as far beyond us as we are beyond chimpanzees.) If you're talking about a universal plateau, then I don't think that's possible.

> but I am asking we are living in a more brother loop in which less intelligent species build more intelligent species.

Maybe? I think we're still a very long way away from being able to answer that. All of the claims about AGI seem to me to be marketing hype at the moment. The only thing anyone can do is speculate.

Although one of the more interesting solutions to the Fermi paradox that I've seen is something along those lines, that biological life if it advances far enough eventually becomes a transitional species that gives way to AI, and AI is what explores the universe.