ChaosBench-Logic v2: Evaluating LLM Logical Reasoning over Dynamical Systems at Scale
Standard accuracy on binary reasoning benchmarks hides critical failure modes: prior collapse, inconsistency under paraphrase, and inability to reason about parameter-dependent dynamics. We present ChaosBench-Logic v2, a 40,886-question benchmark over 165 dynamical systems with 27 FOL predicates and 78 axiom edges, together with CARE (Calibration- and Adversarial-Robust Evaluation), a protocol that surfaces these pathologies. Evaluating 14 models, we find that regime-transition reasoning remains near random (MCC = 0.05) even for frontier models, whereas FOL deduction with given premises reaches MCC = 0.52. Per-family decomposition shows that the proprietary-model advantage concentrates on...
| Authors | Noel Thomas |
|---|---|
| Primary category | cs.LG |
| Published | 23 May 2026 |
| Last updated at source | 14 October 2026 |
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