Presuming Google makes a Pixel 5 XL, we would expect it to cost $100 more than the routine Pixel 5, or $799
Google Pixel 5 vs. iPhone 12: Size and style
The Google Pixel 4’s display used a fairly smooth 90 Hz refresh rate, but it’s not clear if Google will stick with that for the Pixel 5’s OLED panel or go even higher with 120 Hz.