[nl10] BET RIVER vs AK?

Personally, I'd go for a smallish value bet, maybe about 1/4 pot ($ 2.50 - 3). AK should call you, hard to see what else he would have (theoretically, but it's a longshot, someone might play KK or QQ like this if they know you like to barrel aggressively, everything else should have folded by the turn).

I would also go with a thin valuebet here.

Just shove the river and be done with it. It absolutely doesn't matter if u bet small or shove, the calling range of villain doesn't change at all.

If we bet small we have to fold vs a shove.

maybe he has 9x, two spade, 44, kk, qq and so you lose.
else you could win this pot.
he raise utg, so his range was tight, for example AK, AQ, AJ, A10, KK,QQ,JJ,1010 etc
or he raise either suited connected card. 9x - very unfortunately situation.
8 v 2 you could win. I always go bet agressive river value betting.