Sour beer is usually in the 10-13% range. At least Wild Ales are. Berlinerweissen are on the lower end iirc.
Berlinerweissen is as low as 3%. And those Jolly Pumpkin Ales don't exceed 9% (which is already too much for a beer if you ask me). Kwak is 8.4% and Kriek lambic is up to 8%.
Rochefort Trappist caps at 11.3%
Telling you, 12.5% is yorsh.