iPadOS 12.1 (build 16B5059d) is an official Apple over-the-air update for the iPad Pro 12.9-inch (WiFi), released on 2018-09-18T17:20:12Z. The update package is 324.41 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: b4047b67ac757e185488ce13512cebeeb9724209.zip.