The update comes with January 1 security patch level. Also, the new update comes with a new build number NRD90U and LG software version H82020j. The update is rolling out over-the-air, and the update size is around 1.5GB.
The new Android 7.0 Nougat update H82020j for LG G5 will gradually roll out to everyone. So, it might take a few days for the new release to make it to all of the units out there. But at least the rollout has officially started today.