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Li-Liang Chen

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#artificial intelligence Preprint Oct 2026

Rollback: Experience Backtracking in World Models for Policy Improvement

This work introduces Rollback, a policy improvement paradigm that turns world models from passive simulators into counterfactual engines, and builds a scalable training system that unifies distributed world-model search with asynchronous real-robot execution, forming a self-reinforcing cycle.

Jia-Yi Luo, Yang Zhang, Li-Liang Chen et al. · 0 citations
#artificial intelligence Preprint Oct 2026

$\Psi$-0.6: Adaptive Streams of Thought in a Unified Vision-Language World Model

Humans reason about the physical world by flexibly combining different forms of inference as a problem unfolds. Achieving this flexibility is a major open challenge in AI: capabilities often remain separated across specialized models, limiting how they can be composed and jointly adapted to a task. We introduce $\Psi$-...

Khai Loong Aw, Klemen Kotar, Bai-Han Zhang et al. · 0 citations
Preprint Sep 2026

GE-Act 2.0: Pretraining and Scaling a World-Action Model for Robotic Manipulation

World-action models (WAM) predict future states to guide robot actions, enabling learning from both action-free video and action-labeled interaction. Most inherit pretrained video generators, leaving WAM pretraining and scaling underexplored. We introduce Genie Envisioner Act 2.0 (GE-Act 2.0), a world-action model whos...

Ren-Hang Liu, Wen-Zhi Zhao, Zhuo Yang et al. · 7 citations · ⚡4
Preprint Sep 2026

GE-Act 2.0: Pretraining and Scaling a World-Action Model for Robotic Manipulation

Genie Envisioner Act 2.0 (GE-Act 2.0) is introduced, a world-action model whose trainable generative and action components are all initialized from scratch on manipulation data, and its components are jointly trained with knowledge-aligned selective optimization (KASO), which reduces mismatched supervision.

AgiBot Research Team, Ren-Hang Liu, Wen-Zhi Zhao et al. · 4 citations · ⚡1

Zero-shot World Models Are Developmentally Efficient Learners

It is shown that ZWM can be learned from the first-person experience of a single child, rapidly generating competence across multiple physical understanding benchmarks, and shows progressive, staged emergence of capacities during learning and builds brain-like internal representations.

Khai Loong Aw, Klemen Kotar, Wanhee Lee et al. · 6 citations

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