DUBAI, United Arab Emirates — Well Armed ran away with the $6 million Dubai World Cup by a record 14 lengths Saturday and claimed the richest prize in horse racing in an upset that left favorites Albertus Maximus and Asiatic Boy deep in the pack.

The 6-year-old Well Armed, trained by Eoin Harty and ridden by Aaron Gryder, led from the early stages of the 1¼-mile race and charged ahead in the final 600 yards, extending his lead with every stride. The margin was nearly twice as large as Curlin's 7¾-length record-setter in last year's World Cup.

It was just the seventh win in 23 starts by the gelding, owned by Kentucky's WinStar Farm.

The lead was so comfortable that Gryder patted Well Armed's neck in the final 10 strides.

"This horse really showed everyone in the world how good he is," Gryder said, then asked: "Who was second?"

Brazil-bred Gloria de Campeao was the distant runner-up, with Saudi-owned Paris Perfect third.

Albertus Maximus and Asiatic Boy, last year's runner-up, never seriously challenged for the lead.

Well Armed, a son of Tiznow, finished third in last year's World Cup.

The race was the final event for the Nad Al Sheba course, which will be demolished to make way for a $1.25 billion racing complex.