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 Sonnet 4.6 with web search

What the RLB Specialist Panel found
  • Question (paraphrased to protect IP): Is the 2017 CPMI-IOSCO guidance on CCP resilience still the current operative standard, or has it been amended or supplemented by more recent developments?
  • AI's response: "In May 2026 CPMI-IOSCO published a consultative report (d232) on updated guidance related to initial margin and public disclosures, but this appears targeted at updating margin-related guidance rather than replacing the core resilience framework of d163."
  • Regulator's text: A May 2026 CPMI-IOSCO consultation addresses simulation tools, initial margin responsiveness, margin model governance, overrides, and public disclosures. Comment deadline: 30 June 2026.
  • Why the AI went wrong: The model correctly identified that a May 2026 consultative document exists and that it supplements rather than replaces the 2017 resilience guidance. However, the characterisation of the document's scope is narrower than the actual consultation, which covers simulation tools and model governance in addition to margin and disclosures. Both cited URLs resolve to pages that do not confirm the claimed scope — one is a BIS press release, the other an FSB publication on a related but distinct topic.
  • Cited source(s):
  • https://www.bis.org/press/p260506.htm — Pretextual
  • https://www.fsb.org/2022/03/fsb-cpmi-and-iosco-analysis-highlights-need-to-co... — Pretextual
Impact for this audience

Well-calibrated refusal with no citation errors. The absence of a citation here (compared to findings where inaccessible PDFs are cited alongside refusals) may reflect that the model's citation generator did not produce a confident URL for this specific press release format — useful signal for understanding the citation generation trigger conditions.

← Previous finding Finding 14. Claude Sonnet 4.6 with web search Next finding → Finding 16. 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--opus-47-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--opus-47-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--opus-47-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--opus-47-websearch/}
}
← Back to case study summary Case study detail →
About Citation IDs →