Safety & alignment
arxiv arXiv cs.LG · 6d ago

How Safety-Aligned LLMs Interpret Mixed Compliance Demonstrations

A study finds benign and harmful compliance demonstrations are not interchangeable in language models. Benign demonstrations can either reduce or increase harmful compliance depending on the model, with preference optimization playing a key role in preventing harmful compliance. The research also reveals recency bias in demonstration ordering and varied model behaviors in handling refusals during in-context learning.

arxiv arXiv cs.LG · 6d ago

Sovereign Execution Broker for Certificate-Bound Agentic Control

The Sovereign Execution Broker (SEB) introduces a runtime enforcement boundary that verifies and executes certified authority in agentic systems. It ensures production mutation authority is isolated from non-deterministic reasoning by validating execution contracts, validity windows, and revocation states before invoking infrastructure APIs. The prototype demonstrates secure, auditable execution on AWS and Kubernetes with measurable latency and fault resilience.

arxiv arXiv cs.CL · 6d ago

StylisticBias: Visual Cues Drive Most Social Biases in MLLMs

StylisticBias introduces a controlled benchmark to evaluate attribute-level social bias in multimodal large language models. It reveals that age and body type dominate identity-level effects, while fashion style and 15 key visual attributes drive most bias, accounting for nearly 80% of variation. The benchmark highlights that model judgments are most sensitive to appearance-related cues, especially in socioeconomic and style-based contexts.

arxiv arXiv cs.AI · 6d ago

LLM Psychological Profiles Are Measurement Artifacts

A formal psychometric analysis shows that apparent psychological profiles of large language models are primarily driven by response bias, not actual traits. This bias, which causes models to consistently favor one end of a scale, accounts for 81-90% of between-model variation, far exceeding human differences. The study concludes that these profiles are artifacts of instrument design and not true model properties, urging the development of assessments based on response orthogonality.

arxiv arXiv cs.AI · 6d ago

MACR: Explicit Conflict Resolution for LLM Inference

MACR introduces a multi-agent reasoning framework to resolve knowledge conflicts in LLM inference by jointly assessing internal and external knowledge. It uses semantic entropy to measure confidence and employs three specialized agents to induce rules, detect conflicts, and resolve inconsistencies across contexts. Empirical results show MACR outperforms state-of-the-art methods and provides interpretable conflict resolutions.

arxiv arXiv cs.AI · 6d ago

CRAX: Fast Safe Reinforcement Learning Benchmarking

CRAX introduces a high-fidelity, accelerated safety benchmark for reinforcement learning using MuJoCo XLA. It achieves up to 100x speedups over CPU-based benchmarks via vectorization and hardware acceleration, featuring six environment suites and three agent-specific tasks across three difficulty levels. Evaluation of six safe RL methods shows no single approach dominates, highlighting trade-offs between performance and safety, with curriculum learning and safety transfer improving results.

arxiv arXiv cs.LG · 6d ago

EFIQA: Label-Free Fundus Image Quality Assessment with Explainability

EFIQA proposes a label-free framework for fundus image quality assessment that uses anatomical priors to generate spatial quality maps. It first trains an unsupervised anomaly detector via masked anatomical inpainting to identify missing vasculature, then distills this knowledge into a shallow adapter for quality mapping. Evaluation on external datasets shows EFIQA outperforms supervised methods in both performance and explainability across diverse quality criteria.

arxiv arXiv cs.LG · 6d ago

Federated Conformal Risk Control via Risk-Curve Shrinkage

A new federated conformal risk control method addresses coverage failures in hospital-level predictions. On real brain tumor data from 20 institutions, pooled calibration fails 40% of sites, with one exceeding false-negative targets by 7.8 percentage points. The proposed shrinkage-based protocol uses empirical risk curves and a hyperparameter n0=19 to achieve 2.7/20 coverage violations at 2.0x prediction set stretch, while preserving marginal guarantees and ensuring no patient-level data leaves any site.

arxiv arXiv cs.LG · 6d ago

CRAX: Fast Safe Reinforcement Learning Benchmarking

CRAX introduces a high-fidelity, fast safety benchmark for reinforcement learning using MuJoCo XLA. It achieves up to 100x speedups over CPU-based benchmarks via vectorization and hardware acceleration, featuring six environment suites and three agent-specific tasks across three difficulty levels. Evaluation of six safe RL methods shows no single approach dominates, highlighting trade-offs between performance and safety, with curriculum learning and safety transfer improving results.