In this paper , we consider high scale ( 100 TeV ) supersymmetry ( SUSY ) breaking and realize the idea of hilltop supernatural inflation in concrete particle physics models based on flipped-SU ( 5 ) and Pati-Salam models in the framework of supersymmetric grand unified theories ( SUSY GUTs ) .
The inflaton can be a flat direction including right-handed sneutrino and the waterfall field is a GUT Higgs .
The spectral index is n _ { s } = 0.96 which fits very well with recent data by PLANCK satellite .
There is no both thermal and non-thermal gravitino problems .
Non-thermal leptogenesis can be resulted from the decay of right-handed sneutrino which plays ( part of ) the role of inflaton .