For coding Opus 4.8 with ultracode is near perfect and doesn't grind away as many tokens. Fable is advertised as 2x the tokens but in my experience it is closer to 5x what I burn with Opus 4.8.
I only use Fable on things Opus 4.8 would struggle too much with, and as my harness improves that’s less and less. That or they dialed up the intelligence on Opus.
This is no longer true in that I’ve now completed the bulk of my easy work the residual is the tough stuff that Opus cannot do and even Fable struggles with it.