Hey there!
@IsshikiSenn is right that this is intentional. With the current model-picker layout some users are seeing, when Grok 4.5 is selected the closed control shows just the effort/speed setting (e.g. High / High Fast) rather than repeating the model name. Other models still show name + effort. Open the picker anytime to confirm it’s Grok 4.5 - that is still the selected model.
Same layout is also covered here: Cursor IDE agent window stops showing model and turns on “Fast” by default.