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Agentic coding without the cloud: evaluating open-weight large language models on longitudinal data preparation tasks

Research LLM Agents

Merged summary

TL;DR - Researchers introduce RRBench, an open-source framework for evaluating local, open-weight coding agents on longitudinal data preparation. Leading 31–35B models achieved up to 87.9% average task completion, suggesting privacy-preserving local agents may be practical for governance-restricted research.

  • Benchmarks 20 tasks creating 102 variables from six waves of a British cohort study.
  • Covers R-based workflows including category harmonization and multi-wave data merging.
  • Automatically evaluates both generated R code and resulting datasets against curated ground truth.
  • Tests models across consumer-grade deployment configurations without sending sensitive data to cloud services.

Sources (1)

Agentic coding without the cloud: evaluating open-weight large language models on longitudinal data preparation tasks

arXiv cs.AI Mack Nixon, Liam Wright, Yevgeniya Kovalchuk, Alison Fang-Wei Wu, Martin Danka, Andy Boyd, David Bann 2026-07-23 arXiv:2607.21482

TL;DR - Researchers introduce RRBench, an open-source framework for evaluating local, open-weight coding agents on longitudinal data preparation. Leading 31–35B models achieved up to 87.9% average task completion, suggesting privacy-preserving local agents may be practical for governance-restricted research.

  • Benchmarks 20 tasks creating 102 variables from six waves of a British cohort study.
  • Covers R-based workflows including category harmonization and multi-wave data merging.
  • Automatically evaluates both generated R code and resulting datasets against curated ground truth.
  • Tests models across consumer-grade deployment configurations without sending sensitive data to cloud services.
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