Why it matters

Hallucination filter shapes reliability. Understanding shapes RAG.

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The architecture

Extract claims.

Compare to source (NLI).

Flag unsupported.

Ask model to fix / cite.

Hallucination filter flowExtract claimsatomic claimsNLI + fact checkagainst sourcesFlag or fixunsupported claimsNLI (roberta-large-mnli) + custom for domain; combine with retrieval
Hallucination filter.
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How it works end to end

NLI models (roberta-large-mnli).

Citation matching.

External fact-check APIs.

Rewrite unsupported.