Modeling the behavior of concrete during fire is a challenging problem involving heat transfer and two-phase fluid flow with phase change in a porous medium. An additional difficulty is that the material properties of concrete are highly temperature dependent and difficult to determine experimentally. As part of the activities of the RILEM Technical Committee 256-SPF, five research teams conducted a study to evaluate their models. The simulated temperatures and pore pressures were compared with the results from tests with two types of concrete. To obtain a realistic comparison, material data of the two concretes were collected from various reports. On the theoretical side, state-of-the-art formulations are reviewed, and similarities and differences between the implementations are discussed. The study shows that all models give satisfactory results, although with calibration of some key material parameters. Possible reasons for the need for calibration are discussed.