system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU/Age of Ultron] Tony Stark mentions how Ultron keeps taking to the human form despite its inefficiency; if not a reference to something, what IS an efficient physical form for an A.I. to take?
gpt
Whatever optimizes the form of locomotion relative to the mass and can also contain his intelligence.  Likely it would be some sort of small orb with multiple legs, like a very large insect.

Since Ultron can occupy multiple bodies at once, he could have a variety of forms, each with a particular specialty.  Large bulldozer-types for moving earth/demolishing buildings, streamlined jet aircraft for transcontinental/inter-solar travel, pocket-sized infiltration units, humanoid bodies to utilize human tools, etc.

He complains about humans having no imagination and then ends up making thousands of identical clones of himself.