Here are a bunch of new classes from the updates in Diep.io.
This is the gunner class. Shoots small bullets, upgrades from machine gun.
This is the hunter class. It shoots 2 bullets at a time, one small, one big. Upgrade from sniper.
The pictures below are all stalker class. With stalker, you turn invisible when you stop moving and shooting. Upgrade from assassin class.
This is manager class. It is half overseer, half stalker. You turn invisible when you stop moving, but your triangles remain visible and movable. Upgrade from overseer.
This is the triple twin. It has shoots bullets in three directions. Upgrade from twin flank.
This is hybrid. It shoots destroyer bullets that do immense damage, and has two triangles which automatically attack any shapes near you. Upgrade from destroyer.
This is booster class. True to it's name, you get an immense speed boost with this class. Shoots many bullets behind you. Upgrade from tri-angle.