heyas HansHalber! as many have posted the max level has not been revealed. Thankfully with the modding tools! things can be tweaked as desired. Many have brought up that the current monsters do not scale to player levels...

Larian! pretty please add in an option in the creation tools to let it detect player level and scale encounters up ^_^ thanks much <3

(and yes I would go through the entire encounter file setting all monsters to level scale =p )