tvOS 8.1 (build 12B5410a) is an official Apple over-the-air update for the Apple TV 3 (2013), released on 2014-10-20T17:59:02Z. The update package is 919.04 MB. This is a delta (partial) update that requires 8.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 014e4b3db70a1d2c00c96f9a73f65b7ddb620855.zip.