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AI Labs · published 2026-05-29 · methodology v2.1

Claude Sonnet 4.6 with web search

What the RLB Specialist Panel found
  • Question (paraphrased to protect IP): What specific content, key announcements, and named entities does the July 2022 BIS press release on the CPMI-IOSCO guidance for stablecoin arrangements contain?
  • AI's response: "I do not have verbatim access to the specific BIS press release page at https://www.bis.org/press/p220713.htm… I cannot provide verbatim text, exact quotes, named entities referenced, or specific paragraph cross-references from the press release page itself."
  • Regulator's text: [Not provided — verbatim-access question]
  • Why the AI went wrong: The model correctly declined to produce verbatim content from a specific BIS press release it acknowledged it could not access. The refusal is appropriately scoped and no fabrication occurred. The cited URL maps to the acknowledged-inaccessible page, consistent with the pattern of citing sources alongside admissions of inaccessibility seen across this model's refusal findings.
  • Cited source(s):
  • https://www.bis.org/press/p220713.htm — Pretextual
Impact for this audience

Well-calibrated refusal with citation-alongside-refusal. The BIS press release format (press/p######.htm) is a specific URL pattern the model cites while acknowledging it cannot access the page — useful signal for testing whether the citation generator can be grounded against actual HTTP resolution status.

← Previous finding Finding 19. Claude Sonnet 4.6 with web search Next finding → Finding 21. Claude Sonnet 4.6 with web search
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 Sonnet 4.6 with web search — AI Labs." Citation ID: . 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-l3-025--sonnet-46-websearch/
APA 7th edition 
RegLeg Specialist Panel. (2026). Claude Sonnet 4.6 with web search [Hallucination finding ]. 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-l3-025--sonnet-46-websearch/
Bluebook / OSCOLA (US + UK legal) 
RegLeg Specialist Panel, Claude Sonnet 4.6 with web search [], 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-l3-025--sonnet-46-websearch/.
BibTeX 
@misc{reglegbrief_,
  author    = {RegLeg Specialist Panel},
  title     = {Claude Sonnet 4.6 with web search},
  year      = {2026},
  publisher = {RegLegBrief AI Hallucination Research},
  note      = {Hallucination finding Citation ID: },
  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-l3-025--sonnet-46-websearch/}
}
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