Disk space needed for planet w/osm2pgsql and flat nodes, in 2016?

How much disk space is currently necessary to load planet with psm2pgsql? Preferably in terms of both peak use during loading, and then afterward. I see one entry on benchmarks from 2013 saying 194GB[1] and then an answer here saying 700GB, also in 2013[2]. What disk is necessary in 2016?

[1] https://wiki.openstreetmap.org/wiki/Osm2pgsql/benchmarks#Parallels_Virtual_Machine_on_15_inch_Retina_MacBook_Pro_.28Early_2013.29 [2] https://help.openstreetmap.org/questions/26900/import-error-could-not-extend-file