The ux for a trial user tying to access assistant is very poor. I click on the 4 boxes, then assistant, and it sends me to the documentation?! And worse, nowhere on the documentation does it explicitly say that trial users don't have any access at all, so I am left confused. At the least, send me to a page explaining I don't have access, shunting me to the documentation is a total fail.
Anyway, I want to trial assistant. And I would also like to trial the premium models also, I am interested in the ultimate plan. Figure that out, you are loosing people with this setup.