Google has started rolling out the October 5th Android security update to the Pixel line of handsets. Besides the security update, several bugs and issues are fixed, and performance of the phones is improved. For example, the update improves the fast-charging experience on the Pixel and Pixel XL. The Pixel 2 and Pixel 2 XL should see improved performance for certain protected media formats, and improved stability when using Android Auto. All Pixel handsets had their Call Screening behavior when using Maps Navigation, modified.
Pixel 2 XL weighed in at 54.5MB.
Besides the Pixel phones, the October Android security update was sent out starting today to the Essential Phone. As the month progresses, you can expect more Android handsets to receive this month's security update.