From an Information Technology perspective, what's the opposite of Proof of Concept (prototype)?
I'm looking for a better word which means "full-fledged version".
The opposite of a prototype — or a blueprint, or a sketch, or a mock-up, or a model — is a finished product or production version.
I would call it a turnkey project. Wikipedia explains this as:
a type of project that is constructed so that it could be sold to any buyer as a completed product.
But with full-fledged version they would certainly know what you are referring to.
It can be called as Beta Version or Feature Complete.
(Reference: see the Wikipedia article.)