At 26 years and 78 days, Durant is the fourth-quickest and second-youngest player in league history, after LeBron James, to reach the mark. He did it on a short jump shot early in the first quarter that gave Oklahoma City a 9-0 lead.
A four-time scoring champion, Durant has averaged 27.3 points while shooting 48 percent from the field over seven-plus seasons.
He missed 17 games to start this season with a foot injury but has averaged 20.9 points since his return. The 6-foot-9, 240-pound forward has logged 549 games since the Thunder selected him with the No. 2 pick in the 2007 draft.
The Thunder opened this season 3-12 but have won eight of their last nine games to move one game out of a playoff spot in the Western Conference.