TPA: Next Token Probability Attribution for Detecting Hallucinations in RAG (2026.acl-long)
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| Challenge: | Existing approaches attribute hallucinations to a binary conflict between internal knowledge stored in FFNs and the retrieved context. |
| Approach: | They propose a framework which mathematically attributes each next-token probability to seven distinct sources and aggregates source attributions by POS tags to quantify contribution of each model component to the generation of specific linguistic categories within a response. |
| Outcome: | Extensive experiments show that the proposed framework achieves state-of-the-art performance. |
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