The giant sunbird (Dreptes thomensis) is a species of bird in the family Nectariniidae.

It is the only species in the genus Dreptes.

[2] It is endemic to the island of São Tomé (São Tomé and Príncipe), where it occurs in the central massif.

[1] Its natural habitats are subtropical or tropical moist lowland forest and subtropical or tropical moist montane forests.

The species was first described by José Vicente Barbosa du Bocage in 1889.