Author

Joyjeet Singh

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Preprint Aug 2026

The Evaluation Protocol Determines the Result: An Independent Reproduction of LeWorldModel on TwoRoom

One-step prediction accuracy does not predict long-horizon planning success: across three checkpoints spanning a sevenfold range in prediction error, including the authors'own, it orders short-horizon success monotonically and fails to order long-horizon success at all.

Joyjeet Singh · 0 citations

Preprint Aug 2026

The Objective Is the Bottleneck: Latent World Models Encode What Their Planners Cannot Use

On a reproduction of LeWorldModel on TwoRoom the authors show the binding constraint is the planner's objective instead, and on a reproduction of LeWorldModel on TwoRoom they show the binding constraint is the planner's objective instead.

Joyjeet Singh · 1 citation