Spawn runs its multiplayer game world on autonomous Fable-class AI agents
Overview
Spawn, a multiplayer game where players change the world through an in-game AI agent, runs that world on autonomous Fable-class agents, according to Jacob Sansbury as reported by Simon Willison.
Sansbury says the company spends over $3 million a month on tokens, and that agents change live code and ship to production hourly.
Sansbury credits Fable 5 and Fable 5.1 with making this level of autonomy work. He says Opus 5.5 was not sufficient, and that GPT-6 Astra disabled features when applying security fixes. These are Sansbury's claims; the report does not include independent verification of them.
Written by AI from the articles below · updated Oct 29, 2:22 PM ET
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- Simon WillisonBlogSpawn runs its multiplayer game world on autonomous Fable-class agents
AISimon Willison reports on Jacob Sansbury's account of Spawn, a multiplayer game where players modify the world through an in-game AI agent. Sansbury says the company spends over $3 million a month on tokens, with agents changing live code and shipping to production hourly. He says Fable 5 and 5.1 enabled this autonomy, while Opus 5.5 was insufficient and GPT-6 Astra disabled features when applying security fixes.
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