The Grey-Breasted Sabrewing (Campylopterus largipennis) is a species of hummingbird in the Trochilidae family. It is found in Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, and Venezuela. Its natural habitats are subtropical or tropical moist lowland forests and heavily degraded former forest.

The grey-breasted sabrewing has a range in northern South America, including the Guianas, and especially the Amazon Basin and countries. A smaller local range-(disjunct), occurs in southeastern Brazil.