OpenAI tried auto-routing with the initial GPT-5 release and it was immediately clear why that was a bad idea.
intelligence is not omniscience though
Asking questions to clarify user intent is a very low bar for intelligence. A bar that all SOTA models fail consistently at though. (It's both funny and legit infuriating when Opus, after having made a dozen wild assumptions without checking with you, then comes back with a request for clarification on some mundane topic).
but you can keep asking questions ad infinitum
very nontrivial problem knowing when to stop and making assumptions
Yes, that requires some amount of intelligence, that's exactly my point.