Yes, it's down from 40h/week to 3-5h/week on Max plan, effectively. A real bummer. See my comment here [1] regarding [2].
In my experience sonnet 4.5 is basically pointless, it often gets non-trivial tasks wrong, and for trivial tasks I can use a local model or one of the myriad of providers that give free inference.
EDIT: Holy shit I read the github issue, fuck these people.
> We highly recommend Sonnet 4.5 -- Opus uses rate limits faster, and is not as capable for coding tasks.
They're just straight gaslighting us now lmao.
I hope the people downvoting get some minor joy out of it, I know you need it.
It's obvious if you've used the two models for any sort of complicated work.
Codex with GPT-5 codex (high thinking) is better than both by a long shot, but takes longer to work. I've fully switched to Codex, and I used Claude Code for the past ~4 months as a daily driver for various things.
I only reach for Sonnet now if Codex gets cagey about writing code -- then I let Sonnet rush ahead, and have Codex align the code with my overall plan.