iPadOS 12.1.1 (build 16C50) is an official Apple over-the-air update for the iPad Pro 12.9-inch (WiFi), released on 2018-12-05T18:09:09Z. The update package is 416.11 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: a42968111ee99d03f792727c97fb823880d71d32.zip.