What is the approximate upper mass limit distinguishing low-mass stars from high-mass stars post-MS?

Answer

Eight times the mass of the Sun ($8 M_{\odot}$)

Stars typically defined as having less than about eight solar masses follow the path to becoming red giants, whereas those exceeding this mass become red supergiants.

What is the approximate upper mass limit distinguishing low-mass stars from high-mass stars post-MS?
astronomystarsstellar evolutionmain-sequencered giant