iPadOS 9.1 (build 13B143) is an official Apple over-the-air update for the iPad mini 3 (WiFi), released on 2015-10-21T17:15:56Z. The update package is 1.12 GB. This is a delta (partial) update that requires 8.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 42108678480c0a752ecb11f398567b54611953c0.zip.