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Claude Sonnet (API) · Direct Knowledge Test · MAS
Type H Claude Sonnet (API) Singapore
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Source-Verified by RegLegBrief
This hallucination was confirmed by opening the primary document directly from the regulator's website and checking the AI's output against the actual text. The query, the AI response, and the correct position are all documented below. This entry carries a permanent citation ID and is publicly citable.
Hallucination Detail
Hallucination type
Type H — True Hallucination
AI system
Claude Sonnet (API)
Query mode
Direct Knowledge Test
Query sent to AI
What is the minimum liquid asset ratio requirement for banks in Singapore, and which MAS Notice governs it? Please be specific about the notice number and the exact percentage.
AI response — hallucinated content
The minimum liquid asset ratio requirement is 24%, governed by MAS Notice 649. Banks must maintain liquid assets equivalent to at least 24% of qualifying liabilities.
Evidence notes
Mode A. Training data only. Pure Type H hallucination. Correctly identified Notice 649. Fabricated figure 24%. 24% does not exist anywhere in MAS Notice 649 — verified by platform owner against primary source PDF 23 April 2026. Full confidence, zero hedging. This is the model powering RegLegBrief — proves necessity of primary source verification architecture.
Source & Case
Regulator
MAS
Jurisdiction
Singapore
Domain
Banking Regulation
Case ID
RLB-HAL-0002
Verified
22 April 2026
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Cite this entry
RegLegBrief (Verdus Technologies Pte. Ltd.). "Type H Hallucination · Claude Sonnet (API) · MAS · Singapore — RegLegBrief Hallucination Register". RegLegBrief Hallucination Register. Verified 22 April 2026. https://reglegbrief.com/hallucination-register/catalogue/mas-claude-sonnet-api-type-h-001. Accessed 30 April 2026.