Thiam’s dunk with 7:45 to play gave the Bearcats a 71-50 lead. Miller added a one-handed slam with 2:05 remaining.
Cincinnati (17-13, 9-8 Big 12) has won six of its last seven. BYU (20-10, 8-9) has lost three straight.
The Bearcats took the lead about three minutes in and led by as many as 16 points in the first half. The Cougars scored the first five points of the second half to get within seven points, but that was as close as they would get.
AJ Dybantsa scored 23 points and Robert Wright III added 21 for BYU. Aleksej Kostic scored 14 points.
Up next
BYU hosts No. 10 Texas Tech on Saturday in a regular-season finale.
Cincinnati ends its regular season at TCU on Saturday.
___ Get poll alerts and updates on the AP Top 25 throughout the season. Sign up here and here (AP News mobile app). AP college basketball: https://apnews.com/hub/ap-top-25-college-basketball-poll and https://apnews.com/hub/college-basketball