The figure isn't static. Some models require as little as 3.5gb of free memory, others demand 8-16 gigs. MacOS is weird with memory management and everyone's Mac is different; I'd really only recommend running the model on 32-gig machines to avoid writing into swap, but technically it's possible with 8 and 16 gig machines.
which means what? why be so ambiguous. If if needs 16GB, say so. If it needs 32, say so. your sufficient memory comment is insufficient