Anthropic recommends using the expensive Claude Fable 5 mainly as a planner for smaller models instead of running it on every task. Combined with Sonnet 5 in the "Advisor" pattern, this setup hits 92 percent of Fable 5's solo performance at 63 percent of the cost.

My Fable 5 access ends July 7. Before it goes, I documented how it works — as skills — and handed them down to my Opus/Sonnet agent team. Here's exactly what I wrote and how I…

Anthropic's Claude Fable 5 tops all six new industry-specific performance indices from Artificial Analysis, covering finance, law, and medicine. But that lead comes at a steep…