Marshmallow is around the corner, but you know the routine by now. Updates take a while to roll out to some devices. Right now Verizon Wireless is pushing Lollipop to The Galaxy Tab 4 8.0 and Note Pro 12.2.
Following the latest round of over-the-air updates, both devices will run Android 5.1.1. The former is getting software version LMY47X.T337VVRU3BOH2. The latter will show either P905VVRUANK5 (SU3A) or P905VVRUBOH1 (SU3B).
In addition to Lollipop, the Tab 4 is getting a Knox bump from version 2.2 to 2.4. The Note Pro 12.2 will get Download Booster, a new Kids Mode widget, and Knox 2.4 as well. Both receive the obligatory Android security patches.