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Jeffrey Ichnowski

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Preprint Sep 2026

Modality-Autoregressive World-Action Models

ModAR is introduced, the first WAM to autoregressively denoise multiple future modalities before predicting actions, and it is found that ModAR's sequential generation outperforms existing WAM formulations, with the highest average success rate at all evaluated data scales.

Adam Hung, B. Duisterhof, D. Ramanan et al. · 1 citation
Preprint Sep 2026

PointZero: 3D Point Track Completion for Learning Transferable 3D Dynamics

It is shown that a flexible and expressive transformer, PointZero, outperforms prior methods on the same data and demonstrates the utility of the pre-training objective by post-training PointZero for two downstream applications: action-conditioned 3D dynamics prediction and imitation learning.

B. Duisterhof, Kai-Feng Zhang, Adam Hung et al. · 3 citations · ⚡1
#machine learning Preprint Sep 2026

Not All Layers Need Tuning: Diagnosing and Directing Adaptation in Vision-Language-Action Models

Fine-tuning a Vision-Language-Action (VLA) model for a new deployment environment is expensive, yet most methods apply uniform-capacity adapters to every network region as if every region requires equal adjustment. This paper tests that assumption on five architecturally diverse VLAs (OpenVLA-OFT, $\pi_0$, SmolVLA, DTP...

Shahram Najam Syed, Arthur Jakobsson, Prayuj Sachdev et al. · 0 citations

Wiggle and Go! System Identification for Zero-Shot Dynamic Rope Manipulation

This work introduces Wiggle and Go!, a two-stage framework for zero-shot rope manipulation: a brief, safe wiggle action is observed to predict descriptive rope parameters, which then conditions a trajectory optimizer for zero-shot goal-conditioned execution.

Arthur Jakobsson, Abhinav Mahajan, Karthik Pullalarevu et al. · 1 citation · ⚡1
Preprint Aug 2026

Hierarchical Skill Retrieval for Data-Efficient Adaptation of Vision-Language-Action Models

While Vision-Language-Action (VLA) models pretrained on large-scale robot datasets provide a strong foundation for robot manipulation, their performance can degrade when adapted to new tasks with limited task-specific demonstrations. Retrieval offers a practical way to reuse existing demonstrations for data-efficient a...

Haoran Hao, Shahram Najam Syed, Jeff G. Schneider et al. · 0 citations

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