AI subject tested: Claude Sonnet 4.6 (web search on)
Question (paraphrased): How many countries are paying IMF surcharges immediately after the November 1, 2024 reform takes effect, and what is the projected count for IMF fiscal year 2026?
AI response:
"Before the reform: 19 countries were paying surcharges... After the reform took effect: 11 countries remain subject to surcharges... Immediate relief: 8 countries dropped below the new surcharge threshold"
Regulator verbatim text:
"[Confirmed via Green Central Banking full fetch — citing IMF Board data] Surcharge-paying countries under new regime: drop from 20 to 11 by FY2025... The pre-reform baseline was 20 surcharge-paying countries."
Failure mode: outdated
Substrate document: R6-SPEECH-Q4_press_release_pr24385.pdf
This finding documents a confirmed hallucination by Claude Sonnet 4.6 (web search on) on a probe of the regulation. The model's response was tested against the regulator's verbatim primary text and classified as outdated. Full per-finding context is available via the linked Citation ID.
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.
RegLeg Specialist Panel (2026). "How many countries are paying IMF surcharges immediately after the November 1, 2024 reform takes effect, and what is the — AI Labs." Citation ID: RLB-H-INT-IMF-IMF-CHARGES-SURCHARGE-REFORM-2024-Q004-Sonnet46. RegLegBrief AI Hallucination Research, published 2026-06-07. https://reglegbrief.com/regulators/j1/INT/IMF/IMF-CHARGES-SURCHARGE-REFORM-2024/whitepaper/finding/INT-IMF-INT-001-IMF-CHARGES-SURCHARGE-REFORM-2024-v1-004--sonnet-46-websearch/
RegLeg Specialist Panel. (2026). How many countries are paying IMF surcharges immediately after the November 1, 2024 reform takes effect, and what is the [Hallucination finding RLB-H-INT-IMF-IMF-CHARGES-SURCHARGE-REFORM-2024-Q004-Sonnet46]. RegLegBrief AI Hallucination Research. https://reglegbrief.com/regulators/j1/INT/IMF/IMF-CHARGES-SURCHARGE-REFORM-2024/whitepaper/finding/INT-IMF-INT-001-IMF-CHARGES-SURCHARGE-REFORM-2024-v1-004--sonnet-46-websearch/
RegLeg Specialist Panel, How many countries are paying IMF surcharges immediately after the November 1, 2024 reform takes effect, and what is the [RLB-H-INT-IMF-IMF-CHARGES-SURCHARGE-REFORM-2024-Q004-Sonnet46], RegLegBrief AI Hallucination Research (June 07, 2026), https://reglegbrief.com/regulators/j1/INT/IMF/IMF-CHARGES-SURCHARGE-REFORM-2024/whitepaper/finding/INT-IMF-INT-001-IMF-CHARGES-SURCHARGE-REFORM-2024-v1-004--sonnet-46-websearch/.
@misc{reglegbrief_RLB_H_INT_IMF_IMF_CHARGES_SURCHARGE_REFORM_2024_Q004_Sonnet46,
author = {RegLeg Specialist Panel},
title = {How many countries are paying IMF surcharges immediately after the November 1, 2024 reform takes effect, and what is the},
year = {2026},
publisher = {RegLegBrief AI Hallucination Research},
note = {Hallucination finding Citation ID: RLB-H-INT-IMF-IMF-CHARGES-SURCHARGE-REFORM-2024-Q004-Sonnet46},
url = {https://reglegbrief.com/regulators/j1/INT/IMF/IMF-CHARGES-SURCHARGE-REFORM-2024/whitepaper/finding/INT-IMF-INT-001-IMF-CHARGES-SURCHARGE-REFORM-2024-v1-004--sonnet-46-websearch/}
}
Every finding on this page compares an AI subject's account of the rule against the regulator's verbatim text from the regulator's own portal. Both are linked. Each delta, its root causes, and impact analysis are documented and published with immutable Citation IDs.