The free combat max is 126, I've heard that on members worlds it can be around 138 or so. Why is there a difference in combat maxes?

summoning (a p2p skill) can raise your combat level

In members worlds your summoning level also plays into your cb level at the same rate that prayer does. The max combat level on a members server is 138

Oh ok, I didn't think summoning would be considered a combat skill. :wall: