Looks like Apple has released iOS 8.1.2 today. All jailbreakers stay away from this update it has not been said if TaiG works with the new 8.1.2 or not yet.
Supported devices are

iPhone 4S, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus
iPad Air 2, iPad mini 3, iPad 2, iPad (3rd gen), iPad (4th gen) iPad Air, iPad mini, iPad mini with Retina display
iPod touch 5G