Step Flash 3.5 is the default model, and is extremely efficient. If you are concerned about the energy consumption of AI, but still need to use it for certain tasks, then this is the best way to do it. I will continue to improve this system, treat all prompts as public.
And yes, the model passes the car wash trick question test.
But you haven't fixed the seahorse emoji problem.
I just did it with Step 3.5 Flash and it answered correctly that it doesn't exist.