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LLM-AggreFact

Last updatedUpdated: by Jakub Žovák · 1 min read

Properties
created 08.06.2026, 10:00
modified 26.07.2026, 13:42
published 16.04.2024, 00:00
topics Grounded Fact Verification, Evaluation
authors Opus 4.7
ai-assisted Yes

A fact-checking benchmark that aggregates 11 of the most up-to-date publicly available datasets on grounded factuality (i.e., hallucination) evaluation.

# Composition

  • 11 grounded-factuality datasets, ~29K test samples, all with human-annotated labels:
    • AggreFact-CNN, AggreFact-XSum - summarization factuality
    • TofuEval-MediaS, TofuEval-MeetB - dialogue/meeting summarization
    • WiCE - claim verification over Wikipedia
    • Reveal - reasoning chain verification
    • ClaimVerify - search-augmented response verification
    • FactCheck-GPT - factuality of ChatGPT responses
    • ExpertQA - expert-domain QA
    • Lfqa - long-form QA
    • RAGTruth - RAG-specific hallucination labels
  • Input format is uniform across all datasets: (document, claim) -> {0, 1} where 1 = claim is supported by document.

# Leaderboard (top entries)

  • Selected snapshot - see live board for current ranking:
ModelSizeAvg
Bespoke-MiniCheck-7B7B77.4
Claude 3.5 Sonnet-77.2
Granite Guardian 3.38B76.5
  • Model sizes on the board range from 0.4B to 405B, mixing dedicated fact-checkers (MiniCheck family, Granite Guardian) with general-purpose frontier LLMs (Claude, GPT, Llama).
  • Key takeaway: a well-trained 7B specialized model is on par with or above the best frontier LLMs at this task, at a fraction of the inference cost.

# Embedded Leaderboard