The pay-per-use model introduced earlier this year with 400 kWh in free Supercharger credits per year is still the default model for accessing the Supercharger network for all new vehicles being purchased today onward. For owners with vehicles ordered before January 15, 2017, nothing changes for their vehicles and they are still on the original Supercharger access program with free Supercharger for the life of the vehicles.
What changes for vehicles ordered after January 15, 2017, is that they are now not only off of the paid model with 400 kWh in free Supercharger credit per year, but they have now free Supercharging access for the life of their Tesla Model S or Model X ownership – meaning that unlike the original free Supercharger access model, the free access is associated with the owner instead of the vehicle.