MVC with Post/Redirect/Get

I have a question in mind for the MVC pattern for a long time now. When using the Post/Redirect/Get principle then it doesn't make sense to use ONE model in the sense of MVC, right? Why should I modify the data in the model if I don't use it anymore? Am I missing something?

So I need one model for the actions in the controller and one with the data for the view?

My current pattern:

controller

-> call model used for actions

-> handle actions, if an action has been executed, use P/R/G to reload

-> call model used for the view

-> call view with template