iPadOS 12.1.3 (build 16D5039a) is an official Apple over-the-air update for the iPad Pro (10.5-inch, WiFi), released on 2019-01-10T18:08:43Z. The update package is 37.01 MB. This is a delta (partial) update that requires 12.1.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f43bd5f55cdcc6a3fc21129ae8ab3ce98ffb6dd7.zip.