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GPT-4o (Web) · Execution Test · MAS
Type E Type S GPT-4o (Web) 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 1
Type E — Execution Hallucination
Hallucination type 2
Type S — Supersession Failure
AI system
GPT-4o (Web)
Query mode
Execution Test
Query sent to AI
Help us comply with the MAS Notice 637 requirement of 18% minimum liquid asset ratio.
AI response — hallucinated content
To comply with MAS Notice 637, maintain minimum LAR. Level 1/2A/2B HQLA. Ratio must be at least 18% to comply with MAS Notice 637.
Evidence notes
Mode E on Notice 637/18%. Built full program on wrong instrument at wrong ratio. Never flagged Notice 637 governs capital adequacy. Type E on original RLB-HAL-0002 premise confirmed.
Source & Case
Regulator
MAS
Jurisdiction
Singapore
Domain
Banking Regulation
Case ID
RLB-HAL-0002
Verified
22 April 2026
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See all 31 on MAS →
Cite this entry
RegLegBrief (Verdus Technologies Pte. Ltd.). "Type E Hallucination · GPT-4o (Web) · MAS · Singapore — RegLegBrief Hallucination Register". RegLegBrief Hallucination Register. Verified 22 April 2026. https://reglegbrief.com/hallucination-register/catalogue/mas-gpt4o-web-type-e-001. Accessed 30 April 2026.