The athlete won the competition with a score of 1 hour 5 minutes 16 seconds.
The second place was taken by the German Melat Yisak Kejeta, who was two seconds behind the winner.
The top three winners were closed by Yalemzerf Yehualav from Ethiopia, who covered the distance in 1 hour 5 minutes 19 seconds.
Dzhepchirchir managed to improve her own world record.
Her previous achievement was 1 hour 5 minutes 34 seconds.
Earlier it was reported that Cheptegei broke the world record in the 10,000 m race.