They can route between models but you pay the standard rate for whichever model is selected (plus 5% fee). Afaik all current model providers have fixed prices per tokens which don't vary depending on, say, demand or hardware availability.
shivers? as in it frightens you? i believe there is no way around tokens being prices like gasoline at the gas station - it changes every hour. Any other system means you are either over- or underspending.
