Apple just released iOS 8.1.3 for iOS8 running devices. This update includes several bug fixes and improvements. You can upgrade your device over the air at Settings > General > Software update or Download iOS 8.1.3 for later upgrade by connecting your device to a PC with iTunes. You can wait a while until iOS8.1.3 jailbreak confirmation by Taig or Pangu if you need to keep the device jailbroken. The new update sized 247MB and the build number is 12B466.
You can jailbreak iOS 8.1.3 with a trick. Although iOS 8.1.3 jailbreak is not possible at the moment, alternatively you can install iOS 8.2 beta 2 on your device and jailbreak it with TaiG. Apple usually doesn’t allow you to downgrade iOS but you can install Beta versions untill Apple stops signing iOS 8.2 beta 2.