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Open-source tau0-WM launches as a 5-billion-parameter video-action world model for robotic manipulation

Training used 27,300 hours of real-robot and egocentric video.

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Original postChris Paxton#732
Jianlan Luo@jianlanluo

Excited to release τ0-WM: an open-source unified video-action world model for robotic manipulation.

It's a 5B-parameter robotic foundation model trained on 27.3K hours of real-robot teleoperation, UMI-style demonstrations, and egocentric interaction videos.

9:14 AM · May 31, 2026 · 45.8K Views
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Samarth Sinha@_sam_sinha_

Robotics is so fascinating

They talk about scaling, and then train a 5B model on 30k hours of data

Jianlan Luo@jianlanluo

Excited to release τ0-WM: an open-source unified video-action world model for robotic manipulation.

It's a 5B-parameter robotic foundation model trained on 27.3K hours of real-robot teleoperation, UMI-style demonstrations, and egocentric interaction videos.

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