Predicting UPSC cutoffs is a dicey game as every year the cutoff may vary depending on a lot of factors. This year, the number of vacancies have fallen further to 980, so you can expect the cutoff to be higher than last year. UPSC cutoff for 2017 is given below and should give you a glimpse of what to expect this year:
UPSC Prelims: Paper I only: 116
UPSC Mains: 787
This year, the cutoff should rise considering lower number of vacancies unless the paper is designed to be very tough in which the cutoff will fall. As I said before, predicting UPSC cutoff is a very dicey game.