The assessment of the Sn-Te system has been made and compared with those previously reported by two groups of authors. Models, experimental data used in the optimization and the results of the assessments are presented. The three studies take an associate model to describe the liquid and the intermediate compound is considered either as a line compound or having a small range of solubility. The results show that all three assessments agree well with the experimental data. Although the Gibbs free energy of formation of SnTe compound is different in each description, these differences are made up by the assessed liquid model parameters to obtain a good fit of the phase diagram. © 1994.