Shengshu Technology has released Motus2, which is a self-evolving general world model specifically designed for complex robotic manipulations. Co-founder and CEO Luo Yihang demonstrated this system at the Bund summit in 2026.
The authors of the Motus2 project include Shengshu's research identity, GensPI, as well as Tsinghua University; the technical paper was published on arXiv under the number 2608.30237. Unlike many systems that connect an action module to a separate world simulator, Motus2 integrates policy, simulation, and evaluation into a single video-action network with shared parameters.
This network provides three control interfaces. The world-action model offers executable action blocks. The action-conditioned world model predicts the visual outcomes of these blocks. And the value model evaluates the predicted outcomes for selection and learning. During testing, Best-of-N planning analyzes several options, imagines their future, and executes the branch with the highest value before the robot observes the real scene again and replans.
After training, model-based reinforcement learning transforms the same value signal into policy updates, while the prediction and evaluation weights remain frozen so that feedback does not erase the learned dynamics. Furthermore, an action-oriented information mask prevents the policy from looking into future video tokens before making an action decision—this prevents a failure that the team associates with earlier simplified methods combining vision and control.
When performing tasks such as phone placement and multi-finger operations on real robots, the baseline policy achieved about 65% success. Self-planning showed around 67.5%; model-based reinforcement learning showed about 72.5%; and the combination of both methods provided success at about 75%. A lightweight tactile expert, which reuses base features to refine short sub-blocks, increased the success rate of cup retrieval and paper tearing from approximately 60% to 72.5%.
Training data includes a human-centric pyramid consisting of approximately 130,000 hours of egocentric recordings from monocular to synchronized stereo vision, as well as over 100 hours of robot trajectories and human-robot co-occurrence. Scaling stereo imagery from 2,000 to 20,000 hours continued to reduce action prediction error in deferred tests.
Hardware demonstrations include high-degree-of-freedom platforms such as Sharpa Wave and Wuji Hand 2, which are used for screwing in light bulbs, turning pages, and other multi-finger contact tasks requiring verification of both vision and touch.
The team positions Motus2 as an early cycle of recursive self-improvement within constrained tasks—using simulated outcomes to adjust the policy, rather than as open autonomous learning in unbounded environments. For potential technology implementation buyers, the key signal is the closed loop of WAM, AC-WM, and the value model, as well as the measured improvement in phone and multi-finger contact-rich tasks. Shengshu views this loop as progress toward its general world model from L3 to L4, without claiming full autonomy in the open world at this time.