iPadOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPad Pro (10.5-inch, WiFi), released on 2019-01-22T18:08:06Z. The update package is 453.04 MB. This is a delta (partial) update that requires 12.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 700c4a54b10ef51c6009c487ed9973ca692415d4.zip.