The present paper will summarize the results of the first MEDMEX experiment, in which 5 general circulation models were applied to simulate the seasonal cycle in the Mediterranean. The intercomparison was designed so as to impose identical resolutions and forcing functions on the models, aiming at eliminating interpretation problems due to different forcings. The models participating in the intercomparison are two versions of the MOM model, the GHER model. OPA and POM model, whose results are compared.