Pangu Team has dropped iOS 9.1 jailbreak today for 64-bit iPhone, iPad and iPod touch devices. The new tool is available for both Windows and Mac users.
Here is the official changelog of version 1.3.0 of Pangu for Windows and version 1.1.0 of Pangu for Mac :
" Add support for iOS 9.1 devices (64bit only)
iPhone(iPhone 6s Plus, iPhone 6s, iPhone 6 Plus, iPhone 6, iPhone 5s),
iPad( iPad Air 2, iPad Air, iPad mini 4, iPad mini 3, iPad mini 2, iPad Pro) "
As can be seen from the changelog, the new Pangu update only works on 64-bit devices which includes iPhone 6s/6s Plus, iPhone 6/6 Plus, iPhone 5s, iPad Air 2/1, iPad mini 4/3/2 iPad Pro and iPod touch 6, and that too if they are still running iOS 9.1 firmware.