Post #232618 2.34K Sep 21, 2026, 16:54 UTC Fable 5 – Median thinking declined in AugustArticle, Comments X (formerly Twitter) Lon Lundgren (@Lon) on X After Anthropic made Fable 5 permanently available in subscription plans, I noticed a large drop in performance. The model felt dumber, and I couldn't explain why. Measured five different ways, A… 😁 22 🌚 9 🤣 8 💩 2 🌭 2 🤬 1 🤡 1