If you bought a Pixel 1 128GB at launch, it cost you $749. $249.67 per supported year over 3 years.
(The iPhone 6S Plus has same 1080p resolution as the standard size Pixel phone, which is why I use them as the base, but for folks wondering...)
If you bought a Pixel 1 XL 128GB at launch with the higher resolution screen, it cost you $849. $283 per supported year over 3 years.