Also 4+ gen without stealth? Sorry, that’s NOT 4+ gen.
The Russians have almost given up on producing stealthy engines, it seems to me. (At least until GE sells it to them)
They can get the body down, but have been having a heck of a time with the exhaust, in particular.
Their attempts have resulted in very short engine life and really spectacular fires.
That said, I think they can create a plane that is stealthy from the target side vantage, right here and now.
Leaving downtown, however, is another matter.
I believe it is the '4+' that confused you and probably made you think it means gen 5. What it means is better than gen 4, but not gen 5. Some say gen 4.5, while others use 4+ and 4++.