That looks like a SRM to me, but not 100% sure.
If it hasn't faded yet, there's a good chance he may never fade. Most fish that will fade do it between 4-6" in my experience, but there are some outliers that will fade earlier or later. Midas and red devils bred for the aquarium trade have probably been selected for many generations to fade early because the public doesn't recognize unfaded ones and they don't sell.
I recommend feeding a food that will enhance the red pigment, because whether he fades or not, he will look better with richer red and brown coloration. Foods like Hikari Blood Red Parrot pellets or Tetra ColorBits will bring out red pigments within a few weeks.