A variable payload robot is disclosed. In various embodiments, a robot includes two or more joints, each actuated by an associated joint motor and each joint motor having a different capacity, the robot comprising an end effector configured to grasp an object. A processor coupled to the robot is configured to determine based at least in part on the respective capacities of at least a subset of the joint motors and a payload related attribute of the object a plan and trajectory to move the object from a source location to a destination location.