The widening evaluation gap in medical large language model research 2023 to 2026 — Paper

Abstract

Large language models are superseded every few quarters; clinical evidence takes years. We asked whether medical research is keeping pace with the systems it evaluates. PubMed returned 11,628 records for January 2023 to June 2026 across fourteen clinical domains, growing 45-fold; 2.5% used a randomised, controlled or prospective design. Evaluation lag, from a study's newest named model release to its own publication, widened from 1.33 to 6.08 quarters. Because discontinued models age mechanically, we benchmarked this against a counterfactual holding model composition fixed: migration to newer systems offset only 56% of the drift (95% CI 50-65). Randomised trials evaluated models a median 4.6 quarters older than other designs (P = 3 x 10^-19), yet among studies naming a model still under development no design differed from any other; 62% of randomised trials evaluated a discontinued family. Rigour and currency are in tension, and that tension reflects model selection rather than research timelines.

Authors 3

Raad Bin Tareaf, Murad Al-Rajab, Samia Loucif

Specification

Official page: arxiv.org/abs/2609.11770
Source:arXiv (Atom API + RSS)T1observed 9 h agohigh
Arxiv announce type: new
Source:arXiv (Atom API + RSS)T1observed 9 h agohigh
arXiv id: 2609.11770
Source:arXiv (Atom API + RSS)T1observed 9 h agohigh
Categories: cs.CL
Source:arXiv (Atom API + RSS)T1observed 9 h agohigh
PDF: arxiv.org/pdf/2609.11770
Source:arXiv (Atom API + RSS)T1observed 9 h agohigh
Primary category: cs.CL
Source:arXiv (Atom API + RSS)T1observed 9 h agohigh
Published: 11 Sept 2026
Source:arXiv (Atom API + RSS)T1observed 9 h agohigh

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9

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T19

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9 h ago

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Authors: Raad Bin Tareaf, Murad Al-Rajab, Samia Loucif

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Value	Valid from → to	Status	Source	Confidence	Extractor
11 Sept 2026	11 Sept 2026 21:03 UTC → current	current	arXiv (Atom API + RSS)T1	high	deterministic

Claims are temporal and append-only: a new observation closes the previous claim (valid_to) instead of overwriting it. Conflicting claims from different sources are kept side by side and flagged — never averaged. Methodology →

11 Sept 2026
New paperPaperThe widening evaluation gap in medical large language model research 2023 to 2026
New paper: The widening evaluation gap in medical large language model research 2023 to 2026
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Source	Document	Type	Tier	Last observed	Snapshots
arXiv (Atom API + RSS)	rss.arxiv.org/rss/cs.CL	feed	T1· Official	1 h ago	1

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