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ニュース記事 557

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Does LeWorldModel Preserve Local Action Geometry?

arXiv:2610.31716v1 Announce Type: new Abstract: We examine how closely pretrained LeWorldModel (LeWM) reproduces the effects of small action changes. Using matched simulator and model responses, we measure action sensitivity with Gram matrices at three perturbation scales. Across nearly a thousand states from Reacher and OGBench Cube, the most sensitive action directions differ by median angles of about $36^\circ$ and $42^\circ$, respectively, at the smallest scale. Increasing the perturbation tenfold reduces median normalized Gram discrepancy by roughly 70\% on Reacher and 47\% on Cube. Geometry measured in pixels and embeddings varies more across scales than the chosen physical-state geometry. On held-out directions, environment Grams achieve median embedding response errors of 17\% and

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arXiv cs.LG
研究の進展

Latent Coherence: Do Frontier Language Models' Probability Judgments Obey the Law of Total Probability?

arXiv:2610.31833v1 Announce Type: new Abstract: LawZero's Scientist AI trains a Predictor toward the Bayesian posterior, with an objective that penalizes inconsistent probabilities among latent explanations. We ask whether current frontier language models, with no such training, are already consistent in this sense zero-shot: do their probability judgments satisfy the law of total probability, $P(X)=\sum_z P(z)P(X|z)$, when the latent $z$ must be inferred from records in the context? In separate single-turn calls, models are asked for $P(X)$, for $P(z)$ over the latent's states, and for $P(X|z)$; a causal family applies the same test to $P(y|do(x))$ and the back-door adjustment. Every query has an exact ground-truth probability, and a subset of items is asked in three wordings to separate

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arXiv cs.CL
autonomous-driving

DriveMind: Mind-Evolving Belief Tracking for Closed-Loop Autonomous Driving

arXiv:2610.32069v1 Announce Type: new Abstract: Recent multimodal large language models (MLLMs) can perceive a traffic scene, reason about it, and propose a driving action within a single model. However, existing MLLM-based drivers reason from scratch at each frame and commit to a single explanation, discarding earlier hypotheses about the scene. When the scene is ambiguous, the agent locks in on the wrong interpretation and acts on it before evidence accumulates. In this paper, we propose DriveMind, an MLLM-based driving framework that keeps several hypotheses about the scene alive at the same time and updates their weights as new frames arrive. Inspired by particle filtering, DriveMind propagates each hypothesis through a VLM, scores it against the current observation, and resamples to m

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arXiv cs.AI
training-alignment

大規模言語モデルの分布整合性とその一般化特性

arXiv:2610.31687v1 公告タイプ：新規 要旨：大規模言語モデルは、アンケート調査などにおいて、人間の行動をシミュレートし、分析するための手段としてますます広く利用されています。これらの用途において重要な特性は、出力が分布整合性を満たすことであり、すなわち、出力の分布をある参照（ここでは人間の）分布に一致させることです。分布整合性を実現する際の障壁の一つは、少量の学習データから一般化することです。本研究では、(1) 大規模言語モデルをどのように分布整合させるか、および (2) いったん整合された大規模言語モデルが、未見のサンプルや関連しないトピック・タスクに対してもどのように一般化できるかを検討しています。二つの大規模ベンチマークを用いて、大規模言語モデルは確かに分布整合性を達成でき、同一ドメイン内の未見の質問に対しても一般化可能であることを示しました。一方で、トピック間の一般化は、各トピック間の関係性に依存します（例えば、

arXiv cs.CL