iPadOS 12.1 (build 16B5089b) is an official Apple over-the-air update for the iPad 5 (WiFi), released on 2018-10-22T17:01:34Z. The update package is 405.8 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: db7eaf9b52e2b6c5a75420bdbb64248d4d086293.zip.