Medium for sure.
I prefer mine cooked on a cast iron skillet, but the grill does have the nice smoky flavor. I just tried Steak in our InstantPot last night and it was phenomenal. I marinated it in our typical seasoning and cooked it on the rack over 2 cups of bone broth. Meat setting, 7 minutes, and quick release. No searing or smoke flavor, but was tender, juicy, and buttery smooth.