In One Punch Man there are cyborgs and robots. For example G4 was a robot and Genos is a cyborg. But how about Drive Knight? He has something that would seem to be hair, though it could be artificial. And in the manga in a chapter,
He mentions he can't fight anymore because he doesnt have more energy, which makes him look more like a robot than a cyborg, since the human part of cyborg is unlikely to be completely depleted of energy (this doesnt happen to humans either, you might be exhausted but it's difficult you are completely unable to move or through some punches)
So then, Is Drive Knight a cyborg or a robot?