Swedish double Olympic pole vault champion Armand 'Mondo' Duplantis increased his own world record again on Sunday, clearing 6.28 metres to the delight of a home crowd at the Stockholm Diamond League meet.

With victory in the event already guaranteed, Duplantis broke the world record for the 12th time as he sailed over the bar at the first attempt to improve on his 6.27m effort at Clermont-Ferrand in February.

The 25-year-old ripped off his shirt in celebration and raced down the track in front of jubilant spectators at the Olympic stadium built for the 1912 Games.

"It's a magical feeling, it's hard to explain," said Duplantis, who had not before broken the record in Sweden.

"I wanted this so bad. I wanted to do this in front of everybody here in Stockholm.

"It felt like really something special in the crowd today and I knew that everybody really wanted to see it too.

"It'll be one of the greatest memories for me, I think, in my career."

Duplantis notched up his 37th victory in 41 Diamond League outings, finishing well ahead of Australia's Kurtis Marschall who managed a best of 5.90m.

The US-born Duplantis was in a class of his own in another punishing display of vaulting of the highest order.

"I kept saying it was the only thing I was missing in the accolades, to break a record in Sweden," he said.

"I've checked off pretty much everything now."

Duplantis is the heavy favourite for a third successive world championship gold in Tokyo later this year. He is also a three-time indoor world champion.

He first broke the world record in 2020 when he surpassed the 6.16m mark set by Frenchman Renaud Lavillenie.

Duplantis intends to push the bar even higher after his Stockholm exploits.

"I'm going to jump higher. There's not much between me and 6.30, technically. It's just a few centimetres. I'm just a perfect day away from it," he said. (AFP)