MLExpert: Towards a Generalist Agentic Model for Autonomous Machine Learning Engineering
We propose a post-training method for autonomous long-horizon MLE optimization and apply it to train MLExpert, a 35B Mixture-of-Experts agentic model.

ProofPaper ↗
Key points
- Large language models (LLMs) are expanding from assisting scientific research and engineering to autonomously developing and improving AI systems, advancing AI for AI (AI4AI) as a pathway toward recursive self-improvement (RSI).
- Workflow-driven machine learning engineering (MLE) systems provide a practical path toward this pursuit through complex orchestration that manages long-horizon experimentation, while recent MLE systems adopt model-directed interaction, allowing models to autonomously organize experiments and adapt optimization strategies based on execution feedback.
- We design the Kaggle-MLE Factory to construct executable tasks and an interaction harness for model-directed experimentation.
- Hierarchical agentic SFT transfers general tool-use and coding capabilities to MLE through outcome-guided supervision.
Sources (2)
- [1]MLExpert: Towards a Generalist Agentic Model for Autonomous Machine Learning EngineeringarXiv (AI, ML, NLP, CV, robotics, multi-agent) · Oct 15, 05:56 PM
We propose a post-training method for autonomous long-horizon MLE optimization and apply it to train MLExpert, a 35B Mixture-of-Experts agentic model.
Large language models (LLMs) are expanding from assisting scientific research and engineering to autonomously developing and improving AI systems, advancing AI for AI (AI4AI) as a pathway toward recursive self-improvement (RSI).
- [2]MLExpert: Towards a Generalist Agentic Model for Autonomous Machine Learning EngineeringHugging Face Daily Papers · Oct 15, 12:00 AM · same content
Extractive summary: sentences quoted from the sources.
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