The selection of model systems for comparing the convergence behavior of pQED and scQED approaches includes a 2-electron system (helium hydride cation, HeH + ), a 4 electron system (lithium hydride, LiH) that is neutral but polar, and a 10 electron system (hydroxide anion, OH -); for all cases we consider closed-shell singlet states. We represent the HeH + systems in the cc-pVXZ basis sets with X ∈ D, T, Q to systematically approach the complete orbital basis limit, we represent LiH in a 6-311G basis set , and OH -in a 6-31G basis set. We perform all calculations, including computing the adiabatic many electron states and dipole matrix elements for pQED calculations, and the scQED calculations, utlizing the qed-ci package developed by the authors which obtains electron integrals through the psi4numpy interface with the psi4 quantum chemistry package .