---
title: "Generalization or Memorization? Multi-Agent vs. Baseline LLMs"
description: "The paper asks whether LLMs that perform well on tabular classification are actually reasoning or simply recalling benchmarks… 35 references."
authors: ["Aida Sanatizadeh", "Sorouralsadat Fatemi", "Reza Mousavi", "Ahmed Abbasi"]
year: 2026
venue: "Findings of the Association for Computational Linguistics: ACL 2026"
source: "https://aclanthology.org/2026.findings-acl.1994/"
doi: "10.18653/v1/2026.findings-acl.1994"
licence: "CC BY 4.0 (ACL Anthology)"
licence_url: "https://creativecommons.org/licenses/by/4.0/"
summary_licence: "Elamur Cosmic License"
canonical: "https://research.elamur.ai/free/en/papers/sanatizadeh-2026-generalization-or-memorization-multi-agent/"
---
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# Generalization or Memorization? Multi-Agent vs. Baseline LLMs and AutoML Models for Tabular Classification

**Authors:** Aida Sanatizadeh, Sorouralsadat Fatemi, Reza Mousavi and [Ahmed Abbasi](https://md.research.elamur.ai/free/en/authors/ahmed-abbasi/) · **Year:** 2026 · **Venue:** [Findings of the Association for Computational Linguistics: ACL 2026](https://md.research.elamur.ai/free/en/venues/findings/) ([Findings of the Association for Computational Linguistics 2026](https://md.research.elamur.ai/free/en/venues/findings/2026/)) · **Publisher:** [Association for Computational Linguistics](https://md.research.elamur.ai/free/en/publishers/association-for-computational-linguistics/) · **Licence:** [CC BY 4.0 (ACL Anthology)](https://creativecommons.org/licenses/by/4.0/)

**Links:** [Publisher's page](https://aclanthology.org/2026.findings-acl.1994/) · [PDF](https://aclanthology.org/2026.findings-acl.1994.pdf) · [DOI 10.18653/v1/2026.findings-acl.1994](https://doi.org/10.18653/v1/2026.findings-acl.1994) · [OpenAlex](https://openalex.org/W7166809660)

**Citations:** 0 citations (OpenAlex, 2026-10-14)

## Summary
The paper asks whether LLMs that perform well on tabular classification are actually reasoning or simply recalling benchmarks seen during pre-training. The authors built a modular multi-agent system (MALLM) on GPT-4o and LangGraph. Separate agents handle feature analysis, feature engineering, retrieval, and prediction, and the system runs in zero-shot, few-shot, and RAG modes. They compared it with the tabular LLM baselines TABLET and TABLLM and with the AutoML systems AutoGluon, MLJAR, and H2O.

The test set has eleven binary tasks. Five are well-known benchmarks that predate the model's knowledge cutoff. Six are new datasets released afterwards, covering healthcare, education, housing, and workplace settings. Evaluation goes beyond accuracy to include calibration, class imbalance, robustness to renamed features, and instance hardness and typicality.

MALLM matches or beats AutoML on the older benchmarks but falls clearly behind on the unseen data. There it favours the majority class, is poorly calibrated, and varies a lot between runs, especially on difficult cases. AutoML stays stable across both groups. The authors conclude that LLM agents are not yet a substitute for discriminative tabular models in high-stakes use, and that contamination-free benchmarks are needed.

## Key points
- MALLM is built on GPT-4o-2024-08-06. The post-cutoff datasets were all released after September 2024, which reduces, though cannot fully rule out, training-data contamination.
- The six post-cutoff datasets are Student Depression (1000 rows), Postpartum Depression (1491), Employee Satisfaction (1000 rows, 64 features), Students AI Tools (2000), Rental Properties (482), and ICU Admission (254). They come from Kaggle or private sources, and positive-class shares range from 48% to 65%.
- AutoGluon was run with the best-quality preset and a 1-hour limit. H2O used a stacked ensemble optimized for AUC.
- On novel data, AutoML confidence tracks instance hardness more closely, and its results vary less across runs than MALLM's.
- Stated limitations include:
  - small datasets (N \< 2000);
  - binary classification only;
  - no subgroup fairness analysis;
  - higher latency and API cost for MALLM;
  - privacy concerns from sending records to external APIs.

*Our summary of the paper, in our own words — not its text. The work belongs to its authors; read it at the links above.*

## Institutions

- [University of Virginia](https://md.research.elamur.ai/free/en/universities/university-of-virginia/) — University, Charlottesville, United States · 36 works · 9,730 citations
- [University of Notre Dame](https://md.research.elamur.ai/free/en/universities/university-of-notre-dame/) — University, Notre Dame, United States · 51 works · 36,717 citations
- [Northern Illinois University](https://md.research.elamur.ai/free/en/universities/northern-illinois-university/) — University, DeKalb, United States · 2 works · 256 citations

Also on the byline: [California State University, Monterey Bay](https://ror.org/00mjdtw98).

📚 Shelves (4): [🖥️ Computer Science](https://md.research.elamur.ai/free/en/shelves/computer-science/) · 16,667 works · [🤖 Artificial Intelligence](https://md.research.elamur.ai/free/en/shelves/computer-science/artificial-intelligence/) · 16,194 works · [🎭 Arts and Humanities](https://md.research.elamur.ai/free/en/shelves/arts-and-humanities/) · 16,039 works · [🗣️ Language and Linguistics](https://md.research.elamur.ai/free/en/shelves/arts-and-humanities/language-and-linguistics/) · 15,891 works

## Cite

Cite as: Aida Sanatizadeh, Sorouralsadat Fatemi, Reza Mousavi and Ahmed Abbasi. 2026. Generalization or Memorization? Multi-Agent vs. Baseline LLMs and AutoML Models for Tabular Classification. Findings of the Association for Computational Linguistics: ACL 2026.

The paper itself, not this page. BibTeX from the library's record of the work.

```bibtex
@inproceedings{sanatizadeh2026generalization,
  title = {{Generalization or Memorization? Multi-Agent vs. Baseline LLMs and AutoML Models for Tabular Classification}},
  author = {Aida Sanatizadeh, Sorouralsadat Fatemi, Reza Mousavi and Ahmed Abbasi},
  booktitle = {Findings of the Association for Computational Linguistics: ACL 2026},
  year = {2026},
  doi = {10.18653/v1/2026.findings-acl.1994},
  url = {https://doi.org/10.18653/v1/2026.findings-acl.1994}
}
```

- [← previous Generalization in Graph Reasoning: A Systematic Comparison of LLM Training Approaches](https://md.research.elamur.ai/free/en/papers/shirai-2026-generalization-graph-reasoning-systematic-comparison/)
- [next → Generalizing Trust: Weak-to-Strong Trustworthiness in Language Models](https://md.research.elamur.ai/free/en/papers/sun-2026-generalizing-trust-weak-strong-trustworthiness/)
- [↑ back to papers of 2026](https://md.research.elamur.ai/free/en/papers/2026/page/31/)

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*Updated 1 November 2026*