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AgentsCoding agentsAnthropic 10 Sep 2026 reddit

Fable 5.1 Plays MMORPG Ultima Online For 2+ Hours

The brief

A user ran Fable 5.1 with Claude Code in Ultima Online for over two hours using only an open-ended prompt asking it to play naturally.

Key points

  1. The agent explored quests, traded, and interacted with game systems without scripted guidance, demonstrating extended autonomous game-playing ability.
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