Claude Fable 5 builds Rube Goldberg machine

Chaining complex physical layouts and interactive logic in code once required extensive manual programming, but high-context reasoning models can now synthesize functional physics simulations on the first try for the price of a cup of coffee.

* Long-horizon models like Claude Fable 5 showcase a strong grasp of spatial and causal reasoning when generating code.

* While the zero-shot generation is impressive, the $4.44 cost highlights the high token density and expense associated with reasoning-heavy LLMs.

* Sharing the prompt allows other developers to replicate and study the prompt engineering patterns required to build multi-element logical systems.