There are a myriad of pair potentials available for simulating the interactions between water molecules, ranging from simpler models like the SPC/E to more sophisticated ones based on high-level quantum mechanical methods like coupled-cluster calculations.
I'm interested in identifying what is currently considered the "gold standard" ab initio pair potential for the interaction between two water molecules. My primary focus is on quantum mechanical accuracy, rather than the potential's ability to reproduce bulk behavior. Ideally, I'm seeking a highly accurate model that has been validated against quantum mechanical calculations, similar to the one presented in the paper An accurate analytic representation of the water pair potential by Cencek et Al
Additionally, if there is existing code that can reproduce the results of the potential, that would be highly beneficial. Your expert guidance is greatly appreciated, as I have limited experience in this specific area of computational chemistry.