HALP: AI can know it's about to hallucinate before generating a single token
thisdudelikesAI · x · 2026-08-28
Researchers from Stony Brook and the Toyota Technological Institute at Chicago propose HALP (Hallucination Prediction via Pre-Generation Probing). It intercepts a vision-language model's internal state during a single forward pass, before decoding starts, and trains a lightweight probe to predict hallucinations.
Traditional pipelines can only catch hallucinations after the full response is generated and checked against ground truth. HALP instead reads signals straight from the model's machinery—including visual features and other cues—to flag likely hallucinations before the first token appears.
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