Yesterday when I saw this thread I checked online, and the CPI isn't final quite yet. We'll need to wait a few more weeks.
My SS cost of living adjustment would be the same as the CPI.
Since my mini-pension is FERS, my cost of living adjustment (="Diet-COLA") on that pension goes like this:
If CPI < 2%, same as the CPI.
If 2%<CPI<3%, then I get an increase of 2%
If CPI > 3%, then I get an increase of 1% less than the CPI percentage.
I heard another rumor that FERS cost of living adjustments are on the chopping block, but apparently that's not a done deal at all.