Sampling headroom is not selection gain: a compute-value audit of test-time scaling for video world models

arXiv:2609.13257 · cs.CV, cs.AI · Submitted 2026-09-06 · Read on arXiv

cs.CV, cs.AI

Submitted: 2026-09-06

Updated: 2026-09-06

Comments: 33 pages

Code: https://github.com/YuhuaJiang2002/sampling-headroom-is-not-selection-gain

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Test-time Scaling — 2× in this paper · explained in 2 episodes
• World Model — 2× in this paper · explained in 7 episodes
• Test-Time Scaling (TTS) — 1× in this paper · explained in 2 episodes
• Verification — 1× in this paper · explained in 2 episodes

Related papers

• Loss Knows Best: Detecting Annotation Errors in Videos via Loss Trajectories
• AnchorWeave: World-Consistent Video Generation with Retrieved Local Spatial Memories
• Benchmarking the Robustness of Foundation Models for Mammography under Domain Shift
• MambaX-Net: Dual-Input Mamba-Enhanced Cross-Attention Network for Longitudinal MRI Segmentation
• TeleOCR: Navigating Document Parsing Across Digital and Camera-Captured Documents
• A Survey on Efficient Vision-Language-Action Models