The excess enthalpies of liquid alloys in the ternary system GaSb-Te were determined at 1173 K in a heat-flow calorimeter for five sections GaySb1-yTe with y = 0.2, 0.4, 0.5, 0.6 and 0.8. and for the section Ga0.4Sb0.4-Te at 1073 K. The enthalpy surface in the ternary system is determined by a valley of exothermic minima stretching from a minimum at composition Ga2Te3 to one at composition Sb2Te3 in the binaries. The excess enthalpies in the binary systems were adapted with the association model using the Lukas program. Ternary interactions were taken into account for the analytical description of the ternary system.