Hey @Warexpor_ForX thanks for flagging - this isn’t on your end, it’s an issue we’re tracking where cloud agents can start Fast even with a non-Fast default.
Two quick things: in the Default Model picker, hover Cursor Grok 4.6 → Edit and make sure Fast is unchecked (the closed picker hides it and it doesn’t always stick otherwise). And if the follow-up box flips to Fast after the first reply, switch it back before sending.
If an agent still starts Fast after that, drop the agent link and rough time and I’ll dig into that run. More here: Fast mode is selected by deafult or switched on request (cloud agents)