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Agentic Data Engineering for LLMs: System Design and a Controlled Empirical Study

LLM data engineering requires iterative experimentation to determine how data selection, rewards, and curricula affect model learning, making it a natural setting for AI-for-AI (AI4AI) research.

By Ruomeng Ding, Qianli Shen, Zhaoyang Han, Meixin Chen, Daoyuan Chen, Yaliang LiarXiv - cs.CL (NLP)

This article presents a study on Agentic Data Engineering (ADE), a framework that uses AI agents to optimize data engineering strategies for large language models (LLMs) through iterative experimentation and feedback.

What happened

The study introduces the ADE framework, where AI agents experiment with data engineering strategies under fixed protocols. Agents revise strategies using cumulative findings, with performance evaluated on benchmarks. The research demonstrates measurable improvements in tasks like math and code data selection, reward design, and curriculum learning.

Why it matters

For AI developers, this approach offers a systematic way to enhance LLM training efficiency. The findings highlight the importance of balancing experimental feedback with generalization, which is critical for practical AI deployment.

  • ADE provides a structured method for optimizing LLM data engineering.
  • Cumulative findings and evidence analysis enhance research outcomes.
  • In-loop performance gains may not always generalize to real-world scenarios.
  • Iterative experimentation is key to refining data engineering strategies.

The bigger picture

The study suggests that agent-based data engineering can improve LLM performance, but emphasizes the need for careful validation to avoid overfitting to experimental conditions.

The research demonstrates that AI agents can effectively improve LLM data engineering strategies through iterative experimentation, offering a promising approach for optimizing model training while highlighting the need for rigorous validation.

Technical details

  • Agentic Data Engineering (ADE) framework
  • In-loop scores for strategy selection
  • Held-out benchmarks for evaluation
  • Cumulative findings for strategy revision
  • Four tasks: math/code data selection, math reward design, math curriculum learning

FAQ

What is Agentic Data Engineering (ADE)?

ADE is a framework where AI agents iteratively refine data engineering strategies for LLMs using experimental feedback and cumulative findings.

What performance improvements were achieved?

The study reported up to 13.34% gains on AIME25 Pass@32 and 5.85% average improvements across four benchmarks.

Why do in-loop gains not always improve generalization?

The study suggests that strategies optimized for experimental conditions may not fully adapt to unseen data, emphasizing the need for held-out validation.

This summary and analysis were generated with AI from the original article and may contain errors. Read the original for the full story.

Read the full story

Originally published by arXiv - cs.CL (NLP) on Oct 14, 2026.

Read on arXiv - cs.CL (NLP)(opens in a new tab)

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