iPadOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPad Pro 9.7-inch (WiFi), released on 2019-01-22T18:06:56Z. The update package is 379.42 MB. This is a delta (partial) update that requires 12.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 67e5e2093b2c546f5a15e6fbf3d7112639f1ff74.zip.