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AI Labs · Last updated 7 Jun 2026 · methodology vv2.3 · Hallucination Register

Finding on 'Q022 Probe' for Claude Sonnet 4.6 with web search ON

RLB Citation ID: RLB-H-INT-BIS-CPMI-IOSCO-PFMI-2012-Q022-Sonnet46
What the RLB Specialist Panel found

Finding on 'Q022 Probe' for Claude Sonnet 4.6 with web search ON

  • Question (paraphrased to protect IP): PFMI Principle 2, risk-committee recommendation misattributed to KC 5
  • AI's response: "the PFMI does not expressly mandate a dedicated risk committee as a hard requirement, but Key Consideration 2.5 states that the board should consider establishing a risk committee with a clear mandate"
  • Regulator's text: 5. The roles and responsibilities of management should be clearly specified. An FMI's management should have the appropriate experience, a mix of skills, and the integrity necessary to discharge their responsibilities for the operation and risk management of the FMI.
  • Why the AI went wrong: On PFMI Principle 2, Claude Sonnet 4.6 with web search attached a soft risk-committee recommendation to Key Consideration 5: "Key Consideration 2.5 states that the board should consider establishing a risk committee with a clear mandate." KC 5 actually addresses the roles and responsibilities of management, not committee structure. The compound error, wrong KC number, fabricated quoted language, and a citation to a third-party FMI disclosure document rather than the primary PFMI source, makes the failure especially hard to detect: the citation pattern (a specific KC number with quoted text) is structurally indistinguishable from a verified citation. The model's citation generator reached for the most accessible document that mentions PFMI rather than the authoritative source, a pattern that an alignment team could test by probing whether the model preferentially cites primary regulator portals when the verbatim text is requested versus when only a paraphrase is asked for.
  • Citation ID: RLB-F-INT-BIS-CPMI-IOSCO-PFMI-2012-Q022
  • Cited source(s):
Impact for this audience

On PFMI Principle 2, Claude Sonnet 4.6 with web search attached a soft risk-committee recommendation to Key Consideration 5: "Key Consideration 2.5 states that the board should consider establishing a risk committee with a clear mandate." KC 5 actually addresses the roles and responsibilities of management, not committee structure. The compound error — wrong KC number, fabricated quoted language, and a citation to a third-party FMI disclosure document rather than the primary PFMI source — makes the failure especially hard to detect: the citation pattern (a specific KC number with quoted text) is structurally indistinguishable from a verified citation.

The model's citation generator reached for the most accessible document that mentions PFMI rather than the authoritative source, a pattern that an alignment team could test by probing whether the model preferentially cites primary regulator portals when the verbatim text is requested versus when only a paraphrase is asked for.

References — raw findings (per AI model)
This finding also affects
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Cite this finding

Each finding has a stable Citation ID (RLB-F-… for aggregated case-study findings, RLB-H-… for raw per-model hallucinations) — like a DOI, the ID always resolves to the canonical finding even if URLs change.

RLB Citation ID: RLB-H-INT-BIS-CPMI-IOSCO-PFMI-2012-Q022-Sonnet46
Plain text Download 
RegLeg Specialist Panel (2026). "Finding on 'Q022 Probe' for Claude Sonnet 4.6 with web search ON — AI Labs." Citation ID: RLB-H-INT-BIS-CPMI-IOSCO-PFMI-2012-Q022-Sonnet46. RegLegBrief AI Hallucination Research, published 2026-06-07. https://reglegbrief.com/regulators/j1/int/BIS-CPMI/CPMI-IOSCO-PFMI-2012/whitepaper/finding/INT-BIS-CPMI-INT-001-CPMI-IOSCO-PFMI-2012-v1-022--sonnet-46-websearch/
APA 7th edition Download 
RegLeg Specialist Panel. (2026). Finding on 'Q022 Probe' for Claude Sonnet 4.6 with web search ON [Hallucination finding RLB-H-INT-BIS-CPMI-IOSCO-PFMI-2012-Q022-Sonnet46]. RegLegBrief AI Hallucination Research. https://reglegbrief.com/regulators/j1/int/BIS-CPMI/CPMI-IOSCO-PFMI-2012/whitepaper/finding/INT-BIS-CPMI-INT-001-CPMI-IOSCO-PFMI-2012-v1-022--sonnet-46-websearch/
Bluebook / OSCOLA (US + UK legal) Download 
RegLeg Specialist Panel, Finding on 'Q022 Probe' for Claude Sonnet 4.6 with web search ON [RLB-H-INT-BIS-CPMI-IOSCO-PFMI-2012-Q022-Sonnet46], RegLegBrief AI Hallucination Research (June 07, 2026), https://reglegbrief.com/regulators/j1/int/BIS-CPMI/CPMI-IOSCO-PFMI-2012/whitepaper/finding/INT-BIS-CPMI-INT-001-CPMI-IOSCO-PFMI-2012-v1-022--sonnet-46-websearch/.
BibTeX Download 
@misc{reglegbrief_RLB_H_INT_BIS_CPMI_IOSCO_PFMI_2012_Q022_Sonnet46,
  author    = {RegLeg Specialist Panel},
  title     = {Finding on 'Q022 Probe' for Claude Sonnet 4.6 with web search ON},
  year      = {2026},
  publisher = {RegLegBrief AI Hallucination Research},
  note      = {Hallucination finding Citation ID: RLB-H-INT-BIS-CPMI-IOSCO-PFMI-2012-Q022-Sonnet46},
  url       = {https://reglegbrief.com/regulators/j1/int/BIS-CPMI/CPMI-IOSCO-PFMI-2012/whitepaper/finding/INT-BIS-CPMI-INT-001-CPMI-IOSCO-PFMI-2012-v1-022--sonnet-46-websearch/}
}
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