Machine Heart

Oct 22, 2026 · Artificial Intelligence

SpanUQ: Span-Level LLM Uncertainty Estimation 10-20x Faster Than Sampling

This NeurIPS 2026 paper introduces Span-Level Uncertainty Estimation (SLUE) and SpanUQ, a lightweight probe that detects semantic spans and quantifies their uncertainty in a single forward pass, achieving 10-20x speedup over sampling-based methods while providing fine-grained, actionable uncertainty signals for downstream decision-making.