Hi @yktit , thanks for posting your question. I don’t know the exact answer but I would advise you to update pymatgen to the latest version if you have not already. We recently changed the energy corrections that are applied by pymatgen when you pull entries via the MPRester. If you are using an older pymatgen, it’s possible that your system is applying the older corrections even though new corrections are being used to compute e_above_hull shown on the website. See Materials Project Database Release Log - #17 by shyamd for more details.