>Every 2/3 months we're hearing there's a new model that just blows the last one out of the water for coding

I haven't heard that at all. I hear about models that come out and are a bit better. And other people saying they suck.

>Meanwhile, here I am with Opus and Sonnet for $20/mo and it's regularly failing at basic tasks, antigravity getting stuck in loops and burning credits.

Is it bringing you any value? I find it speeds things up a LOT.