iPadOS 12.1 (build 16B5089b) is an official Apple over-the-air update for the iPad Pro 12.9-inch (WiFi), released on 2018-10-22T17:01:40Z. The update package is 358.52 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: eea755159c83c47c353fdb897117ad1fb3b77c12.zip.