While it sucks, I had great results replacing Sonnet 4.5 with GLM 4.7 in Claude code. Vastly more affordable too ($3 a month for the pro equivalent). Can’t say much about Opus though. Claude code forces me to put a credit card on file so they can charge over usage. I don’t mind they charge me, I do mind that there’s no apparent spending limit and hard to tell how much “inclusive” opus tokens I have left.