I am getting AIR 9000 but my OBC category rank will be around 4000. Which rank should i enter in the rank predictor at shiksha.com for OBC

Should i enter AIR or category rank in the rank predictor of https://shiksha.com if i am selecting category as BC. Also, about the opening and closing ranks on the net, are the AIR or category wise ranks. Any help will be greatly appreciated. Thanks in advance