Because we use Gibbs energy and the derivatives of Gibbs energy to optimize the water model for liquid phase, we refer to the model as the Gibbs Optimized Potential for Atomistic Liquid simulation of water (GOPAL). Table lists the parameters of the popular water models as well as the newly optimized water model, GOPAL. GOPAL shows significant reduction in MSE in density and V res over the entire range of temperature and pressures, almost by two to three orders of magnitude compared to all models (TIP, OPC, SPC family), as shown in Figure . This is possible because although some of other water models are extremely good in the low pressure region, they all tend to perform poorly at higher pressures.