I couldn't help thinking it was odd that I was charged 15 credits per query even though I choose Sonnet 3.5 which is supposed to be 3 credits per query. For all my other web browsing Sonnet 3.5 this 3 credit budget has always hold true. So I tried changing to Sonnet 3.7 which indeed is projected to charge 15 credits, ran it once and as expected it charged me 15 credits. Then I switched back to Sonnet 3.5 which I had earlier and suddenly I'm charged 3 credits as expected and not 15. So I have basically been charged for Sonnet 3.7 even though I used 3.5 which has messed up my Clay credit budget for the month.