Model Discrepancy: Selected claude-4-sonnet appears to be Claude 3.5 Sonnet

Come on, it not only quacks like a duck, it also walks like a duck, and looks like a duck. Please spare us these awkward excuses.
I burned yesterday a couple of hours of this dumber version of “Sonnet 4”, had to trash all the results and redo with semi-disfunctional Gemini. Do you think we can’t tell Sonnet4 from an older/inferior model?