A spectral neighbor analysis potential for Cu. The potential is trained against diverse and large materials data, including bulk fcc Cu, strained fcc Cu, ab-initio molecular dynamics (AIMD) simulated random structures, melted structures, surfaces, strained melted structures. The potential gives accurate predictions of structural energies, forces, elasticity, lattice parameters, vacancy migration barrier, equation-of-state, phonon, free energies, melting point, and surface energies.