Every time I use opus these days I go shut up... you are not fable.. Hard to imagine how just three days with it changed how I saw LLM use.
Yes, I've just come to the end of implementing all the planning I did while Fable was available. And nothing now comes close to creating plans that could be coded and just worked like it did.
On a large C codebase, Claude hallucinates constantly, and GPT 5.5 gets there are with a lot of help, but still gets things wrong.
I'm reluctantly starting to feel grateful that I went camping right over the window that Fable was out.
Same.
I really don't feel this way. Seemed pretty similar to me, noticeably better, but marginally. What am I missing?