I don't know if the strict definition of a 10x developer is relative to other people surrounding you; a lot of us could claim to be 10x situationally.
I didn't mind being the smartest person around, but I did find it a relief to be surrounded by other people at or greater than my level when I switched to a different team.
If you're the smartest one in the room, you're probably in the wrong room..
I mean, if I would perform so much better than my coworkers, in the end that would lead to me doing all the work for basically the same pay. So it would be an opportunity to find a more challenging gig.
I didn't mind being the smartest person around, but I did find it a relief to be surrounded by other people at or greater than my level when I switched to a different team.