This is an improved version of the Cu-Zr potential published in [M.I. Mendelev, M.J. Kramer, R.T. Ott, D.J. Sordelet, D. Yagodin and P. Popel, Phil. Mag. 89, 967-987 (2009)., KIM item https://doi.org/10.25950/2f5abf6e ]. This version was designed to fix the problem with artificially stable Laves phases. The potential should be used to study the vitrification and glass properties.