Claude paints a watercolor overnight via robot arm, mixing its own pigments at 4am
新智元 · wechat · 2026-11-07
Berlin developer nil told his Claude to "paint an autumn tree" and went to bed. At 4am, Claude found it lacked transitional colors, paused, and mixed red, ochre, and madder on a second palette — photographing and measuring each well until the shades matched — then finished the painting: 4.5 hours, 303 brushstrokes, 138K views. The entire system (285K lines of code, 1,100+ commits) was written by Claude Code and Codex; nil wrote none of it, and even the UFactory xArm7 robot arm was a secondhand eBay find Claude sourced itself. In September, Codex self-calibrated the brush tip to within 0.2mm by wiggling the arm and inferring 3D offset from three uncalibrated cameras. The article's analysis: painting is a "slow" task where a software-style debug loop (perceive → pause → subtask → verify → resume) can incarnate in the physical world, while millisecond tactile tasks like fetching a ball still stump specialized VLA models — π0.5 hits 94% success tidying unfamiliar kitchens, and Anthropic's Project Fetch had Opus 4.7 finish in 9m35s what humans took 181 minutes to program, yet the dog still can't fetch the ball. General models are pressing the cost of teaching a robot a new skill down to a single night.
Related event: Claude Paints Watercolor Tree With Robot Arm, Mixing Its Own Paint(4 posts)→
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