The grey-breasted sabrewing (Campylopterus largipennis ) is a species of hummingbird in the family Trochilidae.
It is found in humid forest in the Guianas and the Amazon Basin with a smaller disjunct population (subspecies diamantinensis ) in forest and woodland in Bahia and Minas Gerais in eastern Brazil.
A relatively large hummingbird with grey underparts and broad white tail-tips, it is generally common.