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I haven't used Fable yet and I'm almost kinda scared to based on what everyone says, my laptop is basically going to grow legs and run around in circles on me like one of those wacky alarm clocks that jumps off of your nightstand except it'll also plot world domination and destruction

I used it during the week to review a large risky piece of work across multiple PRs. It was _really_ good, like pairing with a Staff developer. It’s not an everyday model though: it’s so tenacious that it happily ran for about 1.5hrs. Gonna miss it for the big risky stuff

I think a more concrete difference: Opus would say "the most likely root cause is" because otherwise it would spend a long time correlating data but Fable would have chased down all the production data to prove whether it was or wasn't. It just didn't really care about how long it spent on a task

tbh, I've rarely noticed any differences in Opus model so maybe I'm not the most sensitive person. But I did think Fable was more concise, more precise, and there just didn't appear to be a complexity horizon where it would give up or gloss over things.