Westbrook quickly scored a layup to make it 109-107, but Golden State's Draymond Green went to the line with 10 seconds left and made two free throws to put the game out of reach.
Durant scored 15 points in the first quarter, then added nine in the second to help the Warriors take a 57-47 advantage at the break. Thunder fans, still sore over Durant's choice to leave Oklahoma City for the Warriors in free agency after the 2015-16 season, booed him throughout the game.
Westbrook scored 18 in the first half to help the Thunder stay in the game.
Oklahoma City closed the gap, and a mid-range jumper by Westbrook tied the score at 76. A 3-pointer by Westbrook put the Thunder up 81-80. Westbrook scored 17 points in the third, but the Warriors rallied and took an 84-81 lead into the fourth.
Warriors: Shot 54 percent in the first half. ... Made just 8 of 29 3-pointers. ... Bench scored 38 points on 18 for 26 shooting.
Thunder: The crowd recognized assistant coach Maurice Cheeks for being chosen for entry into the Naismith Memorial Basketball Hall of Fame. ... C Steven Adams was issued a technical foul for arguing a travel early in the third quarter. ... Outrebounded the Warriors 58-40.
Warriors play at the Indiana Pacers on Thursday.
Thunder play at the Houston Rockets on Saturday.
Follow Cliff Brunt on Twitter: www.twitter.com/CliffBruntAP
For more AP NBA coverage: https://apnews.com/tag/NBAbasketball