Ant Group's Robbyant Open-Sources LingBot-Touch, a Tactile Foundation Model Pretrained on Nearly 5,000 Hours of Touch Data That Lifts Four Robot Policies by 14 to 26 Points on 26 Real-Robot Tasks
Robbyant, the embodied AI company under Ant Group, open-sourced LingBot-Touch on November 9 under Apache 2.0. It uses JEPA-style latent prediction and a shared Haptic Transformer to turn piezoresistive, magnetic, and visuotactile sensor signals into one set of tactile tokens. Per the official technical report, adding the frozen 5.46M-parameter Tiny encoder raised average success of Diffusion Policy, pi0.5, LingBot-VLA, and T-Rex by 13.9 to 24.8 points across 26 real dual-arm dexterous-hand tasks, while feeding raw tactile signals gave at most about half that gain. Tiny and Small weights are on Hugging Face.
Key Takeaways
- Pretraining corpus: 4,983 hours, 464K episodes, about 1.33B frames from tactile gloves and teleoperated robot hands, covering piezoresistive, magnetic, and visuotactile sensing
- Vendor figures on 26 real-robot tasks: LingBot-VLA 48.3% to 73.1%, pi0.5 48.1% to 69.9%, T-Rex 45.4% to 68.6%, Diffusion Policy 21.6% to 35.6%
- The Tiny encoder has only 5.46M parameters, adding under 0.2% to the policies it augments; Small has 21.76M, both are 12-layer Transformers
- In 12 simulated dexterous RL tasks, success reaches 69% vs 46% with task-specific CNN features and 21% without touch
- Caveat: it transfers to sensor models unseen in pretraining, but a new taxel layout still needs geometry calibration first



