Depending on context, you could call a non-prototype a production model, although it seems that this term refers primarily to vehicles. You might also replace model with unit or version. This Google ngram seems to indicate that production unit is the most popular of those three options.
If you are dealing with software, you could call it shipping a 1.0 product or merely a 1.0. Release version is another candidate. And if there are multiple prototypes, they are sometimes referred to as pre-alphas, alphas or betas in the programming community. A prototype that is almost ready for distribution is often called a release candidate.
Added: see this related questionthis related question dealing with the opposite of a proof of concept.