The sole source of information about his life comes from a satire of Peire d'Alvernhe, which mentions that Grimoart was a knight and jongleur.
By far, however, Peire's most famous work is Chantarai d'aquest trobadors, a sirventes written at Puivert (Puoich-vert) in which he ridicules twelve contemporary troubadours ("a poetical gallery") and praises himself.