Personal
- Son of Dragana and Zoran Kostić
- Father, Zoran, played basketball for Yugoslavia
- U12 Judo State Champion
- Enjoys reading, spending time with family
Before BYU
- Played for Arkadia Traiskirchen Lions of Austrian Superliga
- Averaged 6.5 points per game, shooting 36.3 percent from the 3-point range and 83.8 percent from the free thow line
- Scored in double figures 20 times including a pair of 24-point performances
- Led Austria to a fourth-place finish at 2023 FIBA U18 Eurobasket, Division B, where he was the fourth-highest scorer at 19.1 points per game
- Shot 47.9 percent from the field, 39.2 percent from three and 81.5 percent from the free throw line
- Scored in double figures in all but one game including a 34-point outburst in the third-place game against Montenegro