The problem isn’t even that GPT5.6 is cheaper than Fable, it’s just straight up better.

Obviously from a usage/token point of view, Sol is better than Fable, but it’s also just straight up better. I asked Sol and Fable (both on High) to implement a feature that I needed to add to my app. Sol was able to plan and implement it end to end with no problems whatsoever. Asked Fable to do the same thing and its work was riddled with mistakes - I do use AI for coding but I am a software engineer so I personally audit every production from AI.

So to recap, Fable was allegedly nerfed, it makes tonnes of mistakes, is way more expensive, and burns through tokens extremely quickly.

I think like 3 years ago Anthropic was ahead of OpenAI but they’ve fallen behind now.