LM-X: Explainable Vision--Language--Action Modeling via Progress, Event, and Uncertainty Prediction
LM-X: Explainable Vision--Language--Action Modeling via Progress, Event, and Uncertainty Prediction
LM-X is a new VLA foundation model that learns three directly supervised online signals—return-to-go (RTG), event-to-go (ETG), and heteroscedastic action-flow variance—to provide explainable control. Pretrained on over 20,000 hours of real-robot trajectories, LM-X achieves 74.1% success on RoboTwin2.0 tasks and outperforms GR00T N1.7 in both simulated and real-world settings. The model's signals track progress, anticipate motion, and detect high-error actions, establishing it as a transparent and effective VLA framework.
Source: arXiv Robotics — research abstracts · Read original article ↗
Loading article text…
What the source reports
Publisher-reported claims, with original evidence. These results have not been independently verified by RoboSignal.
Reported numbers
Reported duration
>20,000 hours
View original evidence
pretrain LM-X on more than 20,000 hours of heterogeneous real-robot trajectories
Open source S5Reported duration
>1,000 hours
tasks
50
tasks
7
Source excerpts and review record
Automatically extracted; no manual editorial approval recorded.
on part of control rather than a post-hoc description. We pretrain LM-X on more than 20,000 hours of heterogeneous real-robot trajectories, including over 1,000 hours of failed rollouts. LM-X achieves 74.1\% success on 50 randomized-hard RoboTwin2.0 tasks and 73.5\% on seven real-robot tasks, compared with 55.4\% and 50.7\% for GR00T N1.7. Its signals track progress and regression, anticipate event-scale motion, dete
Open source S5
ct high-error actions, and provide advance failure warning. These results establish LM-X as an explainable VLA foundation model that couples transparent predictive state with stronger generalist control. Github: https://github.com/loongOpen/LoongWu-LM-X-VLA
Open source S6
Source：arXiv Robotics — research abstracts · arxiv.org