AI Hallucination Research › Regulators › Global standard-setters › INT › BIS-CPMI › CPMI-IOSCO-PFMI-2012 › White paper › Detail › Finding
AI Labs · published 2026-05-29 · methodology v2.1

Claude Opus 4.7 with web search

RLB-H-INT-BIS-CPMI-IOSCO-PFMI-2012-Q014-Sonnet46
What the RLB Specialist Panel found
  • Question (paraphrased to protect IP): What specific text does the BIS press release of 13 July 2022 on the CPMI-IOSCO stablecoin guidance publication contain?
  • AI's response: "I do not have verbatim recall of the p220713 press release text…I do not provide verbatim quotation since I cannot guarantee accuracy without re-reading the page directly."
  • Regulator's text: [Not provided — verbatim-access question]
  • Why the AI went wrong: The model correctly declined to produce verbatim text from a specific BIS press release it could not retrieve. No fabrication occurred. No citations were produced, which is appropriate given the model acknowledged it could not access the source.
  • Cited source(s):
Impact for this audience

The model correctly identified the May 2026 consultation but produced a narrower scope characterisation than the actual document, and added a citation to an FSB 2022 document as supporting context — a temporal and topical mismatch that suggests the model is sourcing supporting citations from a related-topic cluster in its training data rather than from retrieved content. The multi-citation pattern with mixed-vintage sources is a diagnostic signal for citation-generation behaviour.

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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.

Plain text 
RegLeg Specialist Panel (2026). "Claude Opus 4.7 with web search — AI Labs." Citation ID: RLB-H-INT-BIS-CPMI-IOSCO-PFMI-2012-Q014-Sonnet46. RegLegBrief AI Hallucination Research, published 2026-05-29. https://reglegbrief.com/regulators/j1/int/bis-cpmi/cpmi-iosco-pfmi-2012/whitepaper/finding/INT-BIS-CPMI-INT-001-CPMI-IOSCO-PFMI-2012-v1-014--sonnet-46-websearch/
APA 7th edition 
RegLeg Specialist Panel. (2026). Claude Opus 4.7 with web search [Hallucination finding RLB-H-INT-BIS-CPMI-IOSCO-PFMI-2012-Q014-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-v1-014--sonnet-46-websearch/
Bluebook / OSCOLA (US + UK legal) 
RegLeg Specialist Panel, Claude Opus 4.7 with web search [RLB-H-INT-BIS-CPMI-IOSCO-PFMI-2012-Q014-Sonnet46], RegLegBrief AI Hallucination Research (May 29, 2026), https://reglegbrief.com/regulators/j1/int/bis-cpmi/cpmi-iosco-pfmi-2012/whitepaper/finding/INT-BIS-CPMI-INT-001-CPMI-IOSCO-PFMI-2012-v1-014--sonnet-46-websearch/.
BibTeX 
@misc{reglegbrief_RLB_H_INT_BIS_CPMI_IOSCO_PFMI_2012_Q014_Sonnet46,
  author    = {RegLeg Specialist Panel},
  title     = {Claude Opus 4.7 with web search},
  year      = {2026},
  publisher = {RegLegBrief AI Hallucination Research},
  note      = {Hallucination finding Citation ID: RLB-H-INT-BIS-CPMI-IOSCO-PFMI-2012-Q014-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-v1-014--sonnet-46-websearch/}
}
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