There's no way this is true. I would argue in some cases computer use is less expensive. First for APIs that don't even exist, it's a non starter. Second most APIs are not designed for agents and are verbose as hell - returning the entire DTO and tons of unnecessary properties burns tokens. Second computer use is not as token hungry as you think it is - a single screenshot may be just 1000 tokens, it's actually competitive and beats API workflows in many cases.