I have seen many claims regarding human purpose on here, they have ranged from going on to create a form of AI, all the way to the theistic views such as we are here to serve a god.

No one can really know for certainty and to claim otherwise is simply false.

However I would assert that it is very likely we serve no purpose in the grand scheme of things.
We are an irrelevent speck in an unfathomably large universe, which is under no obligation to make any sense to us.
To think we are even remotely significant would be quite a huge leap in my personal opinion, and grossly underestimating just how large the cosmos is and how we relate to that scale.

The very brutal fact that our sun going supernova will render us obsolete, Let alone the potential heat death of the universe(or any of the other multitudes of potential devestating occurences that may/likely will happen) would lead us to believe we have no reason to be here, and are just lucky to have evolved.

I would say at a push one could claim that within this planet alone, our purpose appears to simply be to multiply.

Thoughts?