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https://www.productionai.institute/graph/events/evt-aiid-704

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Production AI Institute public record · AI Incident Database: Study Highlights Persistent Hallucinations in Legal AI Systems · observed 2024-06-14
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AI Incident Database: Study Highlights Persistent Hallucinations in Legal AI Systems

Stanford University’s Human-Centered AI Institute (HAI) conducted a study in which they designed a "pre-registered dataset of over 200 open-ended legal queries" to test AI products by LexisNexis (creator of Lexis+ AI) and Thomson Reuters (creator of Westlaw AI-Assisted Research and Ask Practical Law AI). The researchers found that these legal models hallucinate in 1 out of 6 (or more) benchmarking queries.

AI Incident Database · Incident 704

Operator lens (medium): inspect D2 (output validation), D6 (autonomy oversight).

Confidence
82%
Sources
3
Entities
7
Detected
detected 764d ago

Event summary

Stanford University’s Human-Centered AI Institute (HAI) conducted a study in which they designed a "pre-registered dataset of over 200 open-ended legal queries" to test AI products by LexisNexis (creator of Lexis+ AI) and Thomson Reuters (creator of Westlaw AI-Assisted Research and Ask Practical Law AI). The researchers found that these legal models hallucinate in 1 out of 6 (or more) benchmarking queries.

D2D6

Linked entities

  • thomson-reuters

    organisation | 70%

  • lexisnexis

    organisation | 70%

  • legal-professionals

    organisation | 70%

  • law-firms

    organisation | 70%

  • organizations-requiring-legal-research

    organisation | 70%

  • clients-of-lawyers

    organisation | 70%

  • legal-system

    organisation | 70%

Related graph edges

EdgeTypeConfidence
ent-aiid-thomson-reuters to ent-psf-d2maps to60%
ent-aiid-thomson-reuters to ent-psf-d2maps to60%
ent-aiid-thomson-reuters to ent-psf-d2maps to60%
ent-aiid-thomson-reuters to ent-psf-d6maps to60%
ent-aiid-thomson-reuters to ent-psf-d6maps to60%
ent-aiid-thomson-reuters to ent-psf-d6maps to60%

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Event dates

  • Happened 23 May 2024

  • Detected 14 June 2024

Sources

  • AI Incident Database - Incident 704

    secondary | checked 9 July 2026

    Open source
  • AI on Trial: Legal Models Hallucinate in 1 out of 6 (or More) Benchmarking Queries

    secondary | checked 10 June 2024

    Open source
  • We asked ChatGPT for legal advice—here are five reasons why you shouldn't

    secondary | checked 14 June 2024

    Open source
Cite this record

"AI Incident Database: Study Highlights Persistent Hallucinations in Legal AI Systems." https://www.productionai.institute/graph/events/evt-aiid-704 (observed 2024-05-23; retrieved 2026-07-18). PAI.

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