One Prompt, 40 Sub-agents: Fable 5.1 Builds a Computer-Use Agent in a Day

every · x · 2026-09-23

Every's Dan Shipper built "Hands"—an agent letting other AI tools (Slack, ChatGPT) remotely control his computer—using a single prompt with Anthropic's Fable 5.1. Earlier attempts on GPT-5.6 Sol and an older Fable model failed. Fable 5.1 orchestrated roughly 40 sub-agents and shipped a working app in a day, a task that normally takes months.

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