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This research introduces TOHA, a topology-based method that detects LLM hallucinations by analyzing attention map inconsistencies rather than relying on costly external training data. By quantifying divergence between source context and generated text structures, the approach offers a resource-efficient alternative for ensuring AI reliability in real-world applications.

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Sber and Skoltech spot AI ‘hallucinations’ with a new graph method

Quantum ZeitgeistSeptember 4, 20263 min read

Researchers from Skoltech and Sber have devised TOHA, a new method to detect AI “hallucinations” in large language models using attention maps.

Researchers from Skoltech and Sberbank’s Center for Practical Artificial Intelligence have developed TOHA, a cost-efficient method for pinpointing unsupported responses in large language models. The TOpology-based HAllucination detector analyzes a model’s attention maps as graphs, identifying inconsistencies between source context and generated text without requiring extensive training data. Published in the proceedings of the A*-ranked…

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