Can We Predict Before Executing Machine Learning Agents?
Paper · 2026 · Jingsheng Zheng, Jintian Zhang, Yujie Luo et al.
Summary
ML agents usually improve their code through repeated generate-execute-feedback cycles. Every candidate has to be trained and run, so a single MLE-Bench run can take many hours. The authors ask whether an LLM can act as an implicit world model and judge which solution will perform better before any code runs. They define a task called Data-centric Solution Preference: the model receives two candidate solutions along with the task's description and a report on its data, then chooses the better candidate and gives a confidence level for that choice.
To test this, they collected real trajectories from the AIDE and AutoMind agents on MLE-bench. Experts filtered these into a pairwise preference corpus. Each input is enriched with a Verified Data Analysis Report: GPT-5.1 writes profiling code, the code runs in a sandbox, and a human checks the log before it is turned into prose.
Reasoning models predict winners clearly better than chance, and their confidence is well calibrated. Built into the FORE-AGENT system, this prediction step speeds up search and also improves results. Skipping execution in this way could make ML agents much cheaper to run.
Key points
- Corpus: 18,438 pairwise comparisons covering 26 MLE-bench tasks in three domains.
- CV: 5,952 pairs; NLP: 6,682 pairs; Data Science: 5,804 pairs.
- The pairs come from 895 curated solutions, selected out of 1,329 valid ones produced by agents running on DeepSeek-V3.1 and o3-mini.
- Prediction accuracy: DeepSeek-V3.2-Thinking reaches 61.5%, compared with 50.0% for random guessing and 50.8% for a complexity-based heuristic.
- FORE-AGENT design: it uses a Predict-then-Verify loop. A confidence gate at c = 0.7 filters candidates, and only the top-1 candidate is actually executed.
- FORE-AGENT results: tested against AIDE on 5 AI4Science tasks (2 of them unseen) under a 12-hour budget.
- About 6× faster convergence.
- 3.2× more search nodes explored.
- +6% Beat Ratio.
- +23% Test Improve Rate.
- Release: code and dataset are available at github.com/zjunlp/predict-before-execute. The authors suggest the corpus could serve as a basis for training reward models.
Fields, topics and concepts
📚 Shelves 4The field of science this work belongs to (OpenAlex fields).Computer Science · 16,667 worksArtificial Intelligence · 16,194 worksArts and Humanities · 16,039 worksLanguage and Linguistics · 15,891 works
Cite
Cite as Jingsheng Zheng, Jintian Zhang, Yujie Luo, Yuren Mao, Yunjun Gao, Lun Du, Huajun Chen and Ningyu Zhang. 2026. Can We Predict Before Executing Machine Learning Agents?. Proceedings of the 64th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers).
@inproceedings{zheng2026can,
title = {{Can We Predict Before Executing Machine Learning Agents?}},
author = {Jingsheng Zheng, Jintian Zhang, Yujie Luo, Yuren Mao, Yunjun Gao, Lun Du, Huajun Chen and Ningyu Zhang},
booktitle = {Proceedings of the 64th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)},
year = {2026},
doi = {10.18653/v1/2026.acl-long.182},
url = {https://doi.org/10.18653/v1/2026.acl-long.182}
}References
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