According to ESPN famous reporter Shams, several sources revealed that the Thunder sent Dillon Jones and a second round pick (from the Rockets in 2029).
Interestingly, there is another Dillon that was also traded this week.
On June 23, the Suns and the Rockets reached an agreement on Durant's transfer. The Suns sent Durant to the Rockets, getting Jaylen Green, Dillon Brooks, the 10th pick this year, and 5 future second round picks.