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Author @pham_blnh built an SO-101 scene in three.js, connected it to a real…

2026-06-25 · 15:01 UTC ·@pham_blnh ·0 min read

Brief

Binh Pham (@pham_blnh) created a complete pipeline: a three.js SO-101 scene linked to a real Leader arm, teleoperation data collection, training of an ACT model, and porting that model to run locally in the browser. Published 2026-06-25, the post presents what they call the first ACT demo on the web and provides an interactive demo at lerobot.binhph.am.

Why it matters

Author @pham_blnh built an SO-101 scene in three.js, connected it to a real Leader arm, and collected teleoperation data for training.

Key details

  • They trained an ACT (Action-Conditioned Transformer) model and ported it to run locally in the browser — claimed as the first-ever ACT demo running on the web (published 2026-06-25).
  • Interactive demo available at lerobot.binhph.am allowing users to try the browser-based physical-AI system without needing a physical robot.
Source evidence

you don’t need a robot to see physical ai in action, you just need a browser.

this week I finally tried something I've wanted to do for a while: design an SO-101 scene in three.js, connect it to a real leader arm, collect teleoperation data, train an ACT model, then port it to run in the browser.

the result is the first ever demo of ACT that runs locally on the web.

try it yourself now at lerobot.binhph.am

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