I hope you folks know this well-publicized visit to Tulsa is just PR. It creates the appearance the decision is going down to the wire, shows Tulsa some respect and allows Elon to personally convey his thanks for their strong interest.
Terafactory Austin is a done deal. I assume the announcement will happen no later than Battery Day (or perhaps shortly after the tax abatement is approved by Travis County Commissioners Court).
It's highly likely that Austin has won. But there's a long history of commercial sniping of deals like this at the last minute.
Everyone around that table knew the stakes. Elon just by turning up was saying "you've got to give me something amazing to pry the factory from Austin" and the Tulsa delegates by hosting him were saying "we're ready to bend over backwards to make a deal work".
If the factory does go to Tulsa it will do so on a road made of gold.