We know Pixel 2 and Pixel 2 XL owners have until January 2021 to be able to upload original quality photos without it counting against your storage. But it seems the original Pixel devices from 2016 won’t be affected by this change. That means owners of the 2016 Pixel and Pixel XL will be able to upload photos and videos in their original state for free for an indefinite amount of time (we can’t say that Google won’t change its mind somewhere down the line).
Source: Android Police