Russell Westbrook scored 18 points, Daequan Cook hit four 3-pointers in quick succession to help Oklahoma City pull away in the first half and the Thunder led wire to wire in a 107-97 victory over the Phoenix Suns on Saturday night.
The Thunder improved to 5-0 and remained perfect in four New Year's Eve home games that have become a tradition since the franchise moved from Seattle to Oklahoma City.
Two nights after his buzzer-beater against Dallas, Kevin Durant had only 12 points in his bid to become the first player since Michael Jordan a quarter-century earlier to score at least 30 in the first five games of a season.
Hakim Warrick and rookie Markieff Morris had 15 points apiece for the Suns, who shot just 40 percent.
Oklahoma City led from the outset, getting a two-handed dunk from Serge Ibaka just after the opening tip and scoring the first seven points. The lead grew to 17-5 after Westbrook's steal and two-handed breakaway dunk just over 5 1/2 minutes in.