iPadOS 12.1.3 (build 16D5032a) is an official Apple over-the-air update for the iPad Pro (10.5-inch, WiFi), released on 2018-12-19T18:06:45Z. The update package is 219.08 MB. This is a delta (partial) update that requires 12.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: fbcac3a85dd3d13a30e3b888e9a65eb54f6e3c12.zip.