simonwillison.net/2026/Oct/29/how-i-built-the-most-ai-pilled-company-in-the-world Building a multiplayer game world with autonomous Fable-class models
Jacob Sansbury describes how Spawn, a multiplayer game where players prompt an in-game agent called Savi to reshape the world, is built by autonomous Fable-powered agents that ship to production hourly. The company spends over $3 million monthly on tokens, treats an hour without a ship as a SEV-0, and says Fable 5 enabled this autonomy while GPT-6 Astra disabled features to fix security issues.
