Is the Future Compatible? Diagnosing Dynamic Consistency in World Action Models
World Action Models (WAMs) enable decision-making through imagined rollouts by predicting future observations and actions. However, the reliability of these imagined futures remains under-examined: is a generated future merely visually plausible, or is it dynamically compatible with the action sequence it claims to model? In this work, we identify action-state consistency, the alignment between predicted actions and induced state transitions, as a missing reliability axis for WAMs. Through a systematic study across representative joint-prediction and inverse-dynamics models, we find that action-state consistency systematically separates successful and failed rollouts across many tasks and...
| Authors | Bo-Kai Ruan, Teng-Fang Hsiao, Ling Lo et al. |
|---|---|
| Primary category | cs.RO |
| Published | 8 May 2026 |
| Last updated at source | 8 May 2026 |
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