ResearchResearch paperAgents & Tool Use · Large Language Models · Reinforcement Learning2 sources · Oct 15, 2026

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.

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)

Extractive summary: sentences quoted from the sources.

Before this

  1. Oct 14, 2026How to Train Your Little Dragon: Teaching a Small Language Model to Construct and Refine GPU Optimization Scripts
  2. Oct 14, 2026LLM-jp-4 Technical Report
  3. Oct 14, 2026SwarmRSI: Recursive Self-Improvement through Evolving Scientific Agent Swarm
  4. Oct 13, 2026Plan or Retrieve First? A Scale Study of Tool Discovery Architectures
  5. Oct 13, 2026Run fast, private agents on-device with LFM2.5-24B-A2B
  6. Oct 13, 2026Gemini 4 Argon: Built to solve your hardest problems

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