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Vlad Sobal

3 accepted papers

2025

$\mathbb{X}$-Sample Contrastive Loss: Improving Contrastive Learning with Sample Similarity Graphs

ICLR 2025poster

Learning good representations involves capturing the diverse ways in which data samples relate. Contrastive loss—an objective matching related samples—underlies methods from self-supervised to multimodal learning. Contrastive losses, however, can be viewed more broadly as modifying a similarity grap…

Cited by 0SourcePDFScholar
2025

Hierarchical World Models as Visual Whole-Body Humanoid Controllers

ICLR 2025poster

Whole-body control for humanoids is challenging due to the high-dimensional nature of the problem, coupled with the inherent instability of a bipedal morphology. Learning from visual observations further exacerbates this difficulty. In this work, we explore highly data-driven approaches to visual wh…

Cited by 5SourcePDFScholar
2025

Learning from Reward-Free Offline Data: A Case for Planning with Latent Dynamics Models

NeurIPS 2025poster

A long-standing goal in AI is to develop agents capable of solving diverse tasks across a range of environments, including those never seen during training. Two dominant paradigms address this challenge: (i) reinforcement learning (RL), which learns policies via trial and error, and (ii) optimal con…

Cited by 0SourceScholar