This paper documents the results of a brief study examining the effects of various modeling assumptions on the predicted inelastic response of steel moment frames. The major variables considered in constructing a variety of inelastic models were as follows : i) the use of simple bilinear type inelastic models, versus the use of more refined models that employ more realistic hardening rules, for modeling the beams, columns, and panel zones ; ii) the effects of varying the value of yield stress assumed for the beams, columns, and doubler plates. Overall, the results of this study indicate that the predicted inelastic dynamic response of steel moment frames may be quite sensitive to modeling assumptions. The response of both the beam and the panel zone can be significantly affected by the presence of a composite floor slab. The predicted inelastic response is sensitive to the assumed value of yield stress for the beams and columns of the model. Varying the model assumptions appears to have an important effect on the predicted location of yielding within a joint. Changing the modeling assumptions can cause the predicted location of yielding at a joint to shift almost completely between the beam and panel zone.