Claude Fable 5 Isn't Nerfed. The Router Is Just Paranoid
Decrypt·
60-second summary
Claude Fable 5's performance is being misinterpreted as nerfed due to inconsistent benchmark results. Two tests yielded vastly different conclusions, sparking debate. The issue lies with the routing layer, which is overly cautious, causing some tests to underperform. This doesn't indicate a nerf, but rather a flawed testing method that's misleading players.
Did Claude Fable 5 get dumber? Two benchmarks, two wildly different conclusions—and one routing layer that explains the whole mess.