Australian superstar Josh Giddey has scored a season-high 25 points as the Oklahoma City Thunder rallied for a 119-112 NBA win over the Pelicans.

The young Boomer added nine rebounds and four assists as the Thunder, second in the Western Conference with a 50-21 season record, bounced back from their loss to Milwaukee.

Giddey's previous best haul this season was 19 in the defeat against the Bucks.

"We don't flinch," the Australian said after the match.

"You've just got to be able to stay level-headed through a swing either way."

Jalen Williams scored 26 points on Tuesday night (Wednesday AEDT) as OKC rallied with a 12-0 run in the final two and a half minutes to escape with victory after losing a 20-point lead in the third quarter.

Shai Gilgeous-Alexander added 24, including a tying three-pointer with 1:29 left.

Zion Williamson had 29 points and 10 assists, and CJ McCollum scored 23 points for the Pelicans, who trailed 88-68 before using a 20-2 run to get themselves - and the crowd - back into the game.

New Orleans briefly went up by five - helped by Trey Murphy III's 28-foot three-pointer and McCollum's driving floater - to take a 112-107 lead with 3:11 left. But the Pelicans did not score again, missing their final five shots.

Chet Holmgren had 16 points for Oklahoma, who won for the fifth time in six games to pull half a game behind Denver for the top spot in the Western Conference.

Murphy and Herb Jones each scored 16 for New Orleans, who lost for just the second time in eight games and fell out of fourth place in the West.

In Milwaukee, Austin Reaves had a triple-double and made a tie-breaking three-pointer with 37.8 seconds left in the second overtime as the Los Angeles Lakers overcame the absence of LeBron James and rallied to beat the Milwaukee Bucks 128-124.

Reaves had 29 points, 14 rebounds and 10 assists in 47 minutes as the Lakers opened a six-game trip by winning their fourth straight despite trailing by 19 points in the fourth quarter and never leading in regulation.

Anthony Davis provided 34 points and 23 rebounds while playing 52 minutes.

Milwaukee's Giannis Antetokounmpo also had a triple-double with 29 points, a season-high 21 rebounds and 11 assists.

In Miami, Klay Thompson scored 28 points and Jonathan Kuminga added 18 and Golden State pulled away in the second half to beat the shorthanded Heat 113-92.

Stephen Curry and Andrew Wiggins each scored 17 for Golden State, who led by two at the half and then by as many as 22 points in the fourth quarter.

Bam Adebayo scored 24 points for Miami, who played without leading scorer Jimmy Butler (illness).

The Heat also were without Tyler Herro (foot) for a 16th consecutive game, Kevin Love (heel) for a 14th consecutive game, and Duncan Robinson (back) for a fourth game in a row.

In Sacramento, the visiting Dallas Mavericks demolished the home-town Kings 132-96.