Tesla Semi is more expensive than a traditional Semi. It is cheaper to run over time. Therefore after a sufficient number of miles, a break even point is reached and the Semi is cheaper to own from that point on.Cheaper to run than ICE?
Elon‘s statement that the semi is cheaper from day one presupposes the buyer is leasing the semi. Therefore in the first month, including the leasing payment, and running costs, you will come out ahead with the tesla semi.
In the case of Model 3, S & X I believe they are priced equivalently to the competition and the sales in the market bear this out. Therefore, you are equal on day one, and ahead the first time you don’t have to fill up with a tank of gas