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Physical Words: A Vocabulary for Structuring Latent Reasoning in Robot Manipulation

Jiaming Liu, Xinghao Zhu, Yiming Zhang, Shanghang Zhang, Yinxi Wang, Yichu Yang, Zhuoyang Liu, Dantong Niu, Soha Pouya, Juekun Li, Yan Chang

Pairs action-word predictions with hidden-state predictions of future visual and tactile observations. Uses these intermediate representations to guide robot manipulation, with separate supervision for action labels and future sensory information.

First public: · Added to this list: October 22, 2026

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ArXiv preprint

arXiv:2610.26854 · Initial submission: 2026-10-19

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Explore this approach

Continuous-state reasoning — Use vectors—lists of numbers—to carry intermediate reasoning from one step to the next, instead of selecting a text token at every step. Some methods use the model's hidden states; others combine several candidate token representations.

Thinking tokens — Give a model extra tokens for computation, such as pauses, filler symbols, or learned planning tokens. These tokens need not spell out the solution.