Evaluating LLM-Based Grant Proposal Review via Structured Perturbations
As AI-assisted grant proposals outpace manual review capacity in a kind of “Malthusian trap” for the research ecosystem, this paper investigates the capabilities and limitations of LLM-based grant reviewing for high-stakes evaluation.

Abstract

As AI-assisted grant proposals outpace manual review capacity in a kind of “Malthusian trap” for the research ecosystem, this paper investigates the capabilities and limitations of LLM-based grant reviewing for high-stakes evaluation. Using six EPSRC proposals, we develop a perturbation-based framework probing LLM sensitivity across six quality axes: funding, timeline, competency, alignment, clarity, and impact. We compare three review architectures: single-pass review, section-by-section analysis, and a ’Council of Personas’ ensemble emulating expert panels. The section-level approach significantly outperforms alternatives in both detection rate and scoring reliability, while the computationally expensive council method performs no better than baseline. Detection varies substantially by perturbation type, with alignment issues readily identified but clarity flaws largely missed by all systems. Human evaluation shows LLM feedback is largely valid but skewed toward compliance checking over holistic assessment. We conclude that current LLMs may provide supplementary value within EPSRC review but exhibit high variability and misaligned review priorities. We release our code and any non-protected data 1 .

CCS Concepts: • Computing methodologies → Natural language generation ; • Social and professional topics ; • Applied computing → Computing in government ; • Applied computing → Decision analysis ;

1 Introduction

Peer review is the foundational mechanism for ensuring scientific rigour and directing funding towards impactful, feasible research. However, the global research ecosystem is currently caught in a “Malthusian trap” [20]: while R&D funding has seen incremental increases, the volume of applications has grown exponentially. In the UK, the number of competitive grant applications assessed by UK Research and Innovation (UKRI) has nearly doubled since 2017, while the overall award rate has plummeted from 36% to 19% [27]. This surge has placed the research ecosystem under unprecedented strain, resulting in systemic reviewer fatigue and a rising administrative burden [33]. Consequently, the peer-review process has seen significantly extended decision cycles, with the end-to-end timeline for major funding schemes now frequently exceeding 18 months [27]. This pressure is exacerbated by a growing dual-standard in generative AI (GenAI) policy [26]. While policy is increasingly permissive for applicants, allowing GenAI for brainstorming, structuring, and language editing, it remains strictly prohibited for reviewers. Allowing applicants but not reviewers to use LLMs creates an asymmetry that risks either lower review quality or longer funding timelines.

Grant evaluation also presents challenges that distinguish it from the more widely studied conference setting. Unlike paper reviewing, which is retrospective (evaluating completed work), grant reviewing is prospective and administrative, requiring high-stakes assessments of value for money, multi-year project feasibility, and national impact. It further demands: (1) Contextual Breadth, assessing diverse documents from financial spreadsheets to impact statements; (2) Applicant Visibility, where non-anonymous metadata increases the risk of prestige or institutional bias; and (3) Decision Stakes, where errors carry consequences associated with significant capital and multi-year commitments. While recent research has explored LLM capabilities in academic peer review for conferences [1, 16], evaluating their readiness for grants demands a fundamentally different methodology. Complete research proposals are tightly guarded assets whose contents comprise novel and highly valuable intellectual property, both financially and in terms of participant careers and reputations. The scarcity of data and the high ethical barriers to access are central to why grant proposals and their reviewing are so understudied, despite their importance.

Recent work using LLMs in the grant domain has been primarily applicant-focused, assisting with proposal drafting, literature discovery and alignment with funding criteria [29, 30]. Okasa et al. [23] developed a supervised pipeline on the content of grant review reports at the Swiss National Science Foundation; however, this only analyses existing human reviews instead of synthesising or evaluating them. To our knowledge, no prior work has systematically evaluated LLM capabilities for the review of grant proposals: assessing whether models can identify substantive weaknesses, produce reliable scores or generate feedback comparable to expert reviewers.

Under this premise, we propose perturbation-based evaluation as a principled solution to this issue of data scarcity. Rather than creating supervision through the labelling of many proposals, we construct controlled fault conditions from a limited pool of genuine grant submissions and measure LLM review systems’ ability to reliably detect known defects. Using six genuine Engineering and Physical Sciences Research Council (EPSRC) proposals, we define a perturbation taxonomy based on six key axes of quality (funding, timeline, competency, alignment, clarity, and impact), decomposing into 42 total perturbations at the most granular level. Each of these may be applied to every proposal to produce variants that reflect known, targeted weaknesses relative to the original. We summarise our contributions as follows: (1) a perturbation-based evaluation framework that enables principled, fine-grained assessment of LLM review systems in data-scarce, high-sensitivity domains, demonstrated here by transforming six proposals into 42 controlled fault conditions across six quality axes; (2) the development of a Council of Personas architecture designed to emulate the multi-perspective nature of expert panels; and (3) a comparative analysis of model-generated feedback against the nuanced judgements of experienced UKRI reviewers to identify current gaps in automated reasoning and potential sources of bias.

Specifically, we address three exploratory research questions: (RQ1) How do different architectural configurations influence the detection of systematic proposal perturbations and the reliability of scoring? (RQ2) Which core assessment dimensions are LLM-based systems most sensitive to? (RQ3) How does the qualitative feedback from LLMs align with the judgements of experienced UKRI reviewers?

2 Related Work

Research on LLMs in academic assessment spans autonomous review generation and reviewer assistance. While models reliably catch surface-level reproducibility and formatting issues [12, 21], they struggle with nuanced methodological flaws and novelty detection [7, 38]. Evidence on review quality is mixed: large-scale work finds that GPT-4 overlaps with human consensus about as much as humans do with each other, though its qualitative feedback remains weak [16], and systems like Reviewer3 show only moderate human agreement [28]; other comparisons report low agreement, with models failing to adapt to a venue's specific focus [5]. A 2022 report for the UK HE funding bodies [32] likewise concluded that AI tools could not yet inform scoring decisions in research assessment, while recommending further pilot testing. These conclusions predate current reasoning models, and our work provides an updated empirical assessment of whether their potential has been realised.

Grant assessment poses distinct challenges. Although proposals and publications are both judged on rigour and novelty, the prospective nature of grants shifts the focus toward justification and feasibility [9], requiring alignment with a specific funding call and a demonstrated gap in the landscape [34]. Prior NLP work here has largely addressed classification of reviewer reports [23] or funding-trend analysis rather than the generative and critical capabilities of LLMs in the review loop. The known limitations of LLMs–summarising content well but missing methodological weaknesses, feasibility, and deep novelty [7, 38]–map directly onto grant criteria such as team competency and resource justification, which demand a holistic synthesis beyond surface-level pattern matching.

2.1 Evaluation via Perturbation

Perturbation-based evaluations have emerged as a standard methodology for probing LLM robustness and the reliability of the “LLM-as-a-judge” paradigm [4, 10]. By systematically altering input text while maintaining core semantic properties, researchers can identify specific model biases and failure modes that remain hidden during standard benchmarking. While foundational frameworks like TextAttack [19] focus primarily on lexical and syntactic transformations, such as word substitutions or character-level noise, recent benchmarks have expanded this to evaluate model consistency across diverse document formats and enterprise-scale contexts [2].

In this work, we extend the scope of perturbation from linguistic variations to domain-specific structural inconsistencies. Unlike general-purpose benchmarks, we target the logical “fatal flaws” unique to the grant domain, such as budget-timeline misalignments or competency gaps, to test whether LLMs can move beyond pattern matching toward the rigorous, high-stakes reasoning required for professional research assessment.

3 Methodology

Research grant proposals are highly sensitive assets, containing both proprietary intellectual property and confidential data of the participants. Due to these privacy constraints and the high ethical burden associated with their processing, the systematic study of grant reviewing remains significantly under-researched. To address these challenges, we evaluate the capability of offline, locally-served LLMs to review proposals submitted to EPSRC. Our methodology maximises the utility of a limited dataset through a perturbation-based approach: we begin with a set of contemporary, human-authored proposals, submitted to EPSRC, and systematically degrade their quality. We deconstruct the notion of proposal quality along six axes: funding, timeline, competency, alignment, clarity and quality, and impact, which we derive from the UKRI assessment process itself. Through this approach, we demonstrate that this (albeit limited) dataset can nevertheless be augmented into a robust benchmark to test the sensitivity, consistency and capabilities of current LLMs for EPSRC proposal reviewing.

3.1 Review Frameworks

3.1.1 Zero-shot Baseline. The baseline system, GPT-OSS-20B (high) [24], is provided with a zero-shot task description, the official UKRI review guidelines, the specific funding opportunity, and the complete proposal narrative in a single context. The model is tasked with producing an overall score (1-6), following the official EPSRC reviewer scoring scale, and a set of comments justifying this score and providing feedback.

3.1.2 Section-Level Review Framework. Input prompts to the baseline approach often exceed 30,000 tokens. While modern LLMs demonstrate high accuracy in simple information retrieval at these lengths, their ability to perform complex reasoning and synthesis decays significantly as context scales [11, 17]. This performance gap, where models struggle to apply a fact to a critical evaluation, is particularly acute in document-level assessment [35]. To mitigate this, we implement a section-level review process, reducing the cognitive load per inference pass encouraging more specific feedback [36].

We created four logical groups from the sections of the proposal documents, as many sections provide little value to review in isolation (e.g. references) but provide valuable context when accompanying others. The groups are: Vision-Approach (vision and approach, references); Team Capability (summary, applicant and team capability to deliver, core team, project partners, facilities, references); Funding Resources (summary, resources and costs, core team, facilities, references); and Ethics (summary, ethics and responsible research and innovation, research involving human participants). We discard purely administrative sections (EPSRC thematic area alignment, letters of support) and sections which were not applicable to any of our reviews (e.g. animal testing, sensitive information).

3.1.3 Council of Personas. The baseline and section level approaches risk propagating single perspective biases and linear errors into the final feedback. To address this, we employ a Council of Personas2, implementing majority-voting for qualitative reasoning via a three-stage process: (1) independent persona-based reviews; (2) blind meta-review and ranking of peer councillor outputs; and (3) final synthesis by a council chair who down-weights anomalous comments based on these rankings.

We use five different personas to encourage feedback diversity: Cost Analyst, Ethics Assessor, Tech Evangelist, Methodological Sceptic, and Impact Champion. Each persona introduces a deliberate bias: for instance, the Methodological Sceptic prioritises soundness and validity, while the Impact Champion focuses on scalability and industry engagement. Full persona descriptions and prompting templates are provided in Appendix A.1. This collective approach ensures that while individual personas may be over-sensitive to specific “fatal flaws,” the final output remains holistic and aligned with standard UKRI guidance.

3.2 Data

Our dataset comprises six full EPSRC funding applications from the School of Computer Science, obtained through collaboration with our institutional research hub. Of these, two proposals were successfully funded, one was unfunded, and the remaining three are awaiting a decision; one funded and one unfunded proposal are accompanied by full expert-review comments and scores. The original submission dates range from May 2023 to August 2025; working with recent proposals mitigates data leakage risks, as it is unlikely this specific content appeared in the pre-training data of current models. Furthermore, as unpublished grant proposals, these documents are not publicly accessible and could not have been included in the training corpora of the models under evaluation.

Assessment Context. Standard UKRI assessment involves evaluation by 3-4 expert reviewers who score applications on a scale of 1-6 across four primary pillars: Research Excellence, National Importance, Applicant Track Record, and Resources and Management. Consequently, our analysis focuses on the Vision and Approach, Team Capability to Deliver, Justification of Resources, and Ethics sections, as these contain the primary claims where “fatal flaws” in feasibility typically appear.

Table 1: Summary of perturbation axes, strategies, and their mapping to EPSRC assessment criteria. Examples and further details can be found in Appendix A.7 and A.8.

Axis

Perturbation Strategy

Targeted Criterion

Funding

Inflating/lowering budgets; removing cost justifications; misaligning resource allocation with project priorities.

Value for money; compliance with UKRI financial policy.

Timeline

Extending periods beyond call limits; unrealistic task compression; misaligning milestones with logical work progression.

Project feasibility; operational justification.

Competency

Removing/replacing key personnel; weakening evidence of technical skills in the team capability section.

Demonstration of requisite skills and leadership.

Alignment

Modifying opportunity aims; switching “What we're looking for” sections; introducing cross-disciplinary mandates.

Strategic fit to call; adherence to funding body values.

Clarity

Removing acronym expansions; introducing vagueness in methods; removing novelty markers; deleting factual background.

Accessibility; technical comprehensibility; academic rigour; specificity.

Impact

Replacing key stakeholders with irrelevant parties; modifying outcome scope; removing long-term/short-term outcomes.

Contribution to field; stakeholder engagement.

Perturbation Strategy. To evaluate model sensitivity across the core dimensions of the UKRI assessment process, we systematically degrade proposals along six primary axes. Table 1 summarises the perturbation strategies and the evaluation criteria they target.

Our strategy was informed by an initial round of human evaluation. Four members of the EPSRC review college, each with extensive grant-reviewing experience, were given either the vision or the approach section and asked to score it from one to six following the standard UKRI rubric, justifying their score with highlighted excerpts and discursive positive and negative feedback. All were within computer science but not necessarily domain experts on each proposal.

Three themes emerged that map onto our axes. Evaluators found referencing to be a general strength but often insufficiently developed to make limitations, motivations and novelty explicit, while technical sections could become overly dense and hard to follow (e.g. unexplained acronyms and missing background). Clear organisation, explicit sectioning, named references and worked examples improved accessibility. These findings inform our clarity axes, capturing weaknesses in framing, evidential sufficiency and academic rigour. Second, evaluators noted disconnects within sections: claims of timeliness were not always supported by evidence, the links between timeliness, impact and motivation were sometimes fragmented, and understanding motivation or feasibility often required speculative reasoning (e.g. absent preliminary studies). These inform our axes of timeline and impact, targeting feasibility, justification and contribution. Finally, evaluators stressed alignment between resources, expertise and positioning: proposals appeared weaker when components did not reinforce one another or when justification in one section went unsupported elsewhere, reducing overall credibility even when individual sections were strong. These concerns inform our funding, competency and alignment axes.

4 Experimental Setup

4.1 Evaluation Tasks

We evaluate our systems using two primary tasks. To simulate secure deployment and satisfy data privacy requirements, all experiments were conducted on isolated single-GPU devices without external access.

Perturbation Identification. We assess the sensitivity of LLM review systems to different aspects of quality by introducing repeatable and independent perturbations into our human-authored grant proposals. Each perturbation was designed to have a solely negative impact on one of the six axes of quality. Sensitivity is measured by observing the proportion of review comments that negatively address the perturbation (e.g. no explanation of abbreviations) or an obvious direct consequence of it (e.g. the section is unclear as none of the methods are explained). Responses are scored as correct only if the perturbation or consequence was both mentioned and with negative sentiment. In cases where the comment partially addresses the perturbation, a consequence could have arisen by multiple means or in any other cases of ambiguity, partial credit is assigned. Contradictory cases of clear identification but positive sentiment are deemed incorrect. This task allows us to explore how architectural choices affect detection performance, which assessment pillars LLMs can and cannot identify, and whether their feedback aligns with expert judgment.

To scale the analysis to all 42 perturbations across all six proposals and in each review setting, we employed a panel of three judge models. The judge first engages in a reasoning phase before responding with one of Correct (C), Partial (P) or Incorrect (I). Providing this list of differences as context mitigates any misinterpretation from our descriptions, while not polluting the context. The prompt template can be found in A.3, further details of the setup in A.4.1, and validation of the judge panel in A.4.2.

Expert–Model Feedback Alignment. Two of our proposals came each with four expert reviews. We decompose these reviews, and those generated by each LLM review system into atomic claims using GPT-OSS-120B (high) that each express a single evaluative aspect. Following a manual assessment, we observe no direct contradictions between human reviewers for each proposal. We define a contradiction to be a factual discrepancies or opposing valence such that two claims cannot both be true at once [14]. LLM claims that do not appear in the set of expert claims are subsequently human annotated. Full details of the claim decomposition method are presented in Appendix A.6.

Table 2: Perturbation identification rates across review systems. C = Correct (perturbation identified with negative sentiment), P = Partial (ambiguous or indirect identification), I = Incorrect (missed or positive sentiment). Verdicts are determined by majority vote across three independent judge models.


Baseline



Section-Level



Council



Perturbation Axis

C

P

I

C

P

I

C

P

I

Funding (n=1688)

159

20

440

220

40

358

115

51

285

Competency (n=889)

28

12

353

32

10

240

15

7

192

Alignment (n=953)

122

2

222

183

1

163

84

0

176

Clarity (n=1859)

6

0

668

99

5

571

12

4

494

Impact (n=639)

10

5

221

71

5

157

7

0

163

Timeline (n=1088)

85

0

314

106

3

289

40

2

249

Overall (n=7116)

410

39

2218

711

64

1778

273

64

1559

4.2 Metrics

We employ the following metrics to evaluate review system performance:

Perturbation Detection Score. A numerical mapping from the judge's verdict: Correct = 1.0, Partial = 0.5, Incorrect = 0.0. This enables continuous analysis of detection performance.

Score Degradation. The signed difference ΔS = Soriginal − Sperturbed between scores assigned to original and perturbed proposals. Positive values indicate appropriate score reduction; negative values flag anomalous cases where perturbation increased the score.

Intra-Class Correlation (ICC). We use ICC(2,1) to assess scoring reliability, treating both proposals and evaluation runs as random effects. This two-way random effects model quantifies the proportion of variance attributable to true differences between proposals [13].

5 Results and Discussion

5.1 Perturbation Identification

We evaluated 42 unique perturbations across 6 proposals using 3 review systems (7,347 perturbed observations total). The overall detection rate was 21.2%; nearly four in five perturbations go undetected.

System Comparison. Table 2 presents detection rates, aggregated by perturbation type. The section-level review system achieved the highest detection scores across nearly all categories (μ = 0.29), followed by the baseline (μ = 0.17) and council approach (μ = 0.17). We confirm that the performance difference between systems is significant via a Kruskal-Wallis3 test (H = 27.62, p < 0.0001) [15].

Through a pairwise comparison of the systems, we find the baseline and council methods produce scores that are statistically indistinguishable (p = 0.83); this is an especially poor result for the council setup given the token cost. Conversely, we observe that the section-level system consistently prescribes lower scores than the other two with a mean difference of around 1.2 points (p < 10− 46). This could be seen as miscalibration or an overly harsh reviewer; however, the high detection rate suggests a more critical and accurate reviewer.

Perturbation Sensitivity. Detection rates varied greatly across different perturbation categories. Perturbations to the alignment were most detectable (μ = 0.41), particularly the cross-cutting theme injections (μ = 0.70); however, We note that the alignment perturbations were performed on the opportunity documents rather than the proposals themselves. We believe that because many opportunity documents likely appear in models’ pre-training data, they have learned the typical structure and conditions of opportunity notices. Deviations from these patterns may appear more salient than comparable changes within proposals which have never been seen. Clarity perturbations, on the other hand, went almost entirely undetected (μ = 0.06); acronym-related changes and connective removal were never identified. Figure 1 demonstrates the interaction between review system and perturbation type. We attribute the consistently poor performance on clarity in part to the subtlety of these perturbations; however, we believe the LLM review systems rely on contextual inference to resolve ambiguous terminology or acronyms rather than flagging them as missing definitions or quality concerns. While this should be a strength, we observe an over-reliance on this ability, with LLM review systems failing to question random abbreviations in the text.

Figure 1: Detection scores across review systems and perturbation categories

Figure 1: Detection scores across review systems and perturbation categories. Darker cells indicate higher detection rates. The section-level system shows strongest performance on alignment and impact perturbations, while all systems fail on clarity-based changes.

Reliability. We decompose the total variance in scores to assess the consistency of each review system (Table 3). The section-level approach achieves the highest intra-class correlation (ICC = 0.50), indicating that approximately half of the observed variance reflects true differences between proposal versions rather than noise. In contrast, both the baseline (ICC = 0.14) and council (ICC = 0.11) systems exhibit substantially higher within-sample variance, meaning repeated evaluations of the same proposal yield inconsistent scores. The council's poor reliability is particularly notable given its significantly higher computational cost (see Appendix A.10); the multi-persona architecture does not translate into more stable assessments. These findings suggest that decomposing the review task into focused sections yields more reproducible judgments than either holistic processing or ensemble-based approaches.

Table 3: Variance decomposition across review systems. ICC (intra-class correlation) measures the proportion of variance attributable to true differences between proposals versus noise from repeated evaluation.


$sigma ^2{text{total}}$

$sigma ^2{text{between}}$

$sigma ^2{text{within}}$

ICC (↑)

Baseline

0.87

0.13

0.80

0.14

Council

0.91

0.11

0.88

0.11

Section-Level

0.88

0.49

0.49

0.50

5.2 Expert–Model Feedback Alignment

Table 4: Retained (Ret) and Contradiction (Ctr) Rates of claims. Retained rate is computed from the exclusive set, where consensus claims are removed, isolating claims unique to each reviewer. Higher retained percentages indicate greater reviewer-specific contribution (unique claims), whereas lower values suggest substantial overlap.


Human


Baseline


Council


Section-Level


Category

Ret

Ctr

Ret

Ctr

Ret

Ctr

Ret

Ctr

Alignment

79.6%

2.8%

68.2%

0.0%

71.8%

1.9%

80.0%

0.0%

Competency

67.7%

2.1%

76.8%

1.8%

66.7%

1.6%

52.2%

0.0%

Ethics

97.7%

0.0%

95.0%

0.0%

94.0%

1.2%

90.0%

0.0%

Funding

81.3%

8.0%

84.0%

0.0%

89.5%

4.8%

100.0%

0.0%

Impact

77.8%

1.2%

85.3%

0.0%

73.8%

1.0%

66.7%

0.0%

Clarity

93.5%

1.6%

98.5%

0.0%

83.9%

1.9%

86.2%

6.9%

Timeline

96.7%

0.0%

100.0%

0.0%

84.6%

2.6%

85.7%

14.3%

TOTAL

82.2%

2.2%

86.5%

0.4%

78.2%

2.1%

77.4%

2.8%

Figure 2: Agreement and severity score distributions

Figure 2: Table 11 shows the scale for severity. The dashed line on agreement indicates the neutral agreement.

Human annotation.   For the validity label, annotators were asked to label each claim, originating from human reviewers or LLM systems, as either valid or invalid. As this label functions as a quality check, the majority of claims are expected to be valid, resulting in a naturally high agreement of 89.5%. In this setting, Fleiss’ κ is an unsuitable measure as it penalises agreement that arises from a genuine class imbalance rather than annotator bias [3]. For Agreement and Severity, we see a Fleiss’ κ of 0.78 and 0.68, respectively, indicating substantial agreement.

As shown in Figure 2, all systems score above the neutral midpoint for agreement, though human and Council claims show tighter distributions at higher values. For severity, LLM systems tend to prioritise high-severity claims, while human reviewers contribute a broader range, including more low- or "None"-severity observations that provide contextual framing. The Baseline diverges from this pattern, producing a more balanced distribution centred on moderate severity.

Claim analysis.   In Table 4, exclusive claim rates are consistently high across all reviewer types, indicating substantial divergence in the issues each raises. Human reviewers show strong exclusivity in Ethics, Clarity, and Timeline, while the baseline exhibits even higher overall exclusivity, particularly in Clarity, Timeline, and Impact, suggesting it frequently introduces points beyond those raised by humans. The council shows slightly lower exclusivity in Competency and Impact, indicating greater overlap, while the section-level model displays more variability across dimensions. Critically, claims rarely contradict each other, averaging around 2% of total claims, indicating that unique claims are generally additive rather than conflicting. However, uniqueness alone does not guarantee quality, as a unique claim may still be low severity or disagreeable.

Examining individual claims through Table 7, the most pronounced variance appears in Ethics, where LLM systems raise specific concerns such as data governance, GDPR compliance, and environmental sustainability, whereas human reviewers typically offer broader assessments affirming that RRI considerations are adequate. This suggests LLMs surface granular compliance criteria that human reviewers either overlook or implicitly accept as satisfied earlier in the funding cycle.

Table 5: Spearman correlations between valence and outcome measures by method.


Review

Spearman ρ

Significance

Agreement

Human

0.258

0.014


Baseline

0.431

< 0.001


Council

0.732

< 0.001


Section-Level

0.613

0.006

Severity

Human

0.250

0.018


Baseline

0.306

0.008


Council

0.236

0.270


Section-Level

0.318

0.141

Table 6: Valence distribution (percentage of total claims per source).


Negative

Neutral

Positive

Human

17.4%

33.1%

49.5%

Baseline

41.7%

20.8%

37.5%

Council

22.2%

25.9%

52.0%

Section-Level

48.1%

12.3%

39.6%

Valence Analysis. We examined correlations between valence and human evaluations for both human and LLM claims. Valence was positively correlated with agreement across all systems (Table 5), though the correlation was small for human claims and substantially stronger for LLM systems, particularly the council and section-level variants. These patterns align with the valence distributions in Table 6: human and council claims were predominantly positive, whereas baseline and section-level systems generated more negative claims. Valence-severity correlations were weaker and not statistically significant for the council and section-level systems.

Score distributions (Figure 2) show human and council systems clustering at the upper end of the agreement scale, while baseline and section-level outputs remain more neutral. Human claims exhibit a broader range of severity, reflecting a tendency toward general, affirmatory acknowledgments of proposal content alongside critique rather than focusing exclusively on weaknesses, which accounts for the high variance in severity scores. These findings suggest that while all systems show a positive correlation between valence and agreement, the stronger effect in LLM systems indicates that models are more proficient at generating positive claims than identifying genuine weaknesses, with LLM-generated criticisms consistently less aligned with human judgment.

6 Conclusion

This paper presents an exploratory investigation into the capabilities of LLMs and their potential for use within the EPSRC grant proposal review process. Using a perturbation-based evaluation framework across six axes of grant quality and a human annotation study with members of the EPSRC review college, we show that current LLM systems exhibit highly uneven sensitivity. Alignment perturbations applied to opportunity documents are identified relatively reliably, likely reflecting internalised patterns from pre-training, whereas clarity-based perturbations to proposals are largely missed. These gaps reflect a fundamental difference between grant and paper peer review: where the latter rewards technical depth, grant reviewing demands holistic judgment about whether a proposal merits public investment. Overall, current LLMs show significant limitations for autonomous grant review but may offer value as assistive tools within the process, particularly for structured feedback and alignment checking under human oversight.

Limitations

We evaluate six proposals from a single institution using one model family (GPT-OSS), restricting generalisability across disciplines, funding bodies, and architectures. The scale is sufficient for exploratory analysis but precludes strong statistical claims. The ecological validity of our perturbations also varies: some reflect plausible errors (e.g., budget inflation) while others serve as stress tests (e.g., acronym substitution), so detection rates should be interpreted as upper bounds on sensitivity. Finally, our human evaluation relies on reviewers from the same institution as the proposal authors, and the per-section annotation design, while ethically necessary, prevents assessment of cross-section coherence.

Ethics Statement

This project has been granted ethical approval by the affiliate institution. All proposals were sourced voluntarily from within the affiliated institution and all handling and processing was conducted on institutional infrastructure. Annotations were conducted also within the institution and in person on an offline device. Annotations were conducted on a per-section level, ensuring any annotator never saw all sections from any single proposal to limit the possibility of plagiarism. All annotators were remunerated at a rate of £25/h.

Acknowledgments

This work was supported by the Arts and Humanities Research Council [grant number AH/X004201/1]. Joseph James was supported by the UKRI AI Centre for Doctoral Training in Speech and Language Technologies (SLT) and their Applications funded by UK Research and Innovation [grant number EP/S023062/1].

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Appendix A — complete PDF-layout facsimile

The supplied 15-page proceedings PDF contains Appendix A on pages 8–15. These lossless, page-level facsimiles preserve its two-column reading order, prompts, tables, equations, Figure 3, and all supplementary material. The source PDF is also retained.

Appendix A, pages 8–10 — preprocessing and multi-stage council prompts

Appendix A, source PDF page 8
Appendix A, source PDF page 9
Appendix A, source PDF page 10

Appendix A, pages 11–12 — panel judges, human evaluation, taxonomy, and Figure 3

Appendix A, source PDF page 11
Appendix A, source PDF page 12

Appendix A, pages 13–15 — Tables 8–12

Appendix A, source PDF page 13
Appendix A, source PDF page 14
Appendix A, source PDF page 15

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