This is truly vindication for my efforts to get off of frontier models and harnesses as much as possible.

I won't deny the model is _pretty good_ but it is not worth all of this whiplash.

I really envy you. There is a clear divide amongst my colleagues now in terms of who is using Fable and who isn't (this is math work, so it is well and truly better than all the other models). Everyone is quickly becoming reliant on this, and with Anthropic constantly changing their mind, it's just miserable.