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@Nag1ovo · 2026-10-09 22:31

Something we didn't expect: with no IK tools, @AnthropicAI's Claude Opus 5.5 wrote its own IK for the G1 arm, typing the link offsets in from memory. 🤯 No internet, no access to the simulator's model files. Yet in 22 of its 27 programs, the offsets match Unitree's public URDF to five significant figures. And they match the original release: our simulator runs a later revision with the shoulder 1 cm higher. @OpenAI's GPT-6 Astra never used these numbers. It servoed on pixels and scored about the same. How much of a "one-demo" agent's prior is everything it has already read about the robot? 🎬 https://bigym2.github.io

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