The three-time world indoor champion overtook the pacemaker just before the half-way mark, which was reached in 2:42.65, and continued to extend her lead over her younger sister Anna and Morocco’s Siham Hilali.
As well as the outdoor 1500m world record, Dibaba now owns the fastest ever recorded times indoors for the 1500m, mile, 2000m, 3000m, two miles and 5000m.
Elsewhere in Sabadell, European champion Adam Kszczot won the 800m in 1:46.31 with Spanish record-holder Kevin Lopez taking second place in 1:46.58.
European 5000m silver medallist Adel Mechaal was a convincing winner of the 3000m, clocking 7:48.39 to finish more than two seconds ahead of Italy’s Marouan Razine.
Jon Mulkeen for the IAAF