Well, they have older ones of course. But the current options actual users see is "Auto" or "Instant (5.3)" or "Thinking (5.4)". Not that complicated really.

i guess you still have the "auto" as an option to route your request

I much prefer this, we can choose based on our use-cases, and people who don’t care can still use Auto.

5 itself might have solved the problem of having too many different models somewhere in the backend