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GAUGE Tests Simulators and Video World Models in 1,560 Physical Experiments, With No Single Engine Winning Across the Board

GAUGE puts physics engines and generative world models through the same real-world benchmark, diagnosing errors separately in trajectories, equation forms, and physical parameters. The results show that visually plausible output—or even conformity to the correct equation form—does not guarantee accurate acceleration, momentum transfer, or oscillation periods.

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Programmatic Tool Calling Matches or Beats JSON in 11 of 14 Models, With an 18.8-Percentage-Point Gap on Long-Chain Tasks

A new study compiles API schemas into typed Python stubs, allowing models to chain or invoke tools in parallel within a single inference. The method matches or outperforms native JSON for most models on a BFCL v4 subset, but it has so far been tested only with simulated tools that return their arguments, so the results do not establish that real-world API workflows would see the same benefits.

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TrajDebug Tracks the Lifecycle of Agent Errors, With Failure Diagnosis Improving Rerun Success Rates by 10.8% on Average

TrajDebug does not treat the first error in an agent trajectory as the root cause. Instead, it tracks whether errors are repaired, whether they leave an impact on the final outcome, and how much recovery budget they consume. In tests on 486 human-annotated trajectories, converting diagnoses into prompts improved the success rate of rerunning the same tasks by 10.8% on average.

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New Research Finds Adam Breaks Matrix-Factorization Symmetry, Allowing Identical Functions to Converge to Different Attention Representations

The study traces the difference between Adam and low-rank recovery to the coordinate-wise preconditioner’s lack of gauge equivariance. In published experiments, two functionally equivalent initializations trained with Adam produced attention invariants that differed by 56%, though the findings have not yet been validated in large-model pretraining.