Pith. sign in

REVIEW 28 cited by

MLGym: A New Framework and Benchmark for Advancing AI Research Agents

Not yet reviewed by Pith; the record is open.

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 2502.14499 v1 pith:MJGHZXSX submitted 2025-02-20 cs.CL cs.AIcs.LG

MLGym: A New Framework and Benchmark for Advancing AI Research Agents

classification cs.CL cs.AIcs.LG
keywords researchagentstasksframeworklearningmodelsalgorithmsbenchmark
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
0 comments
Share X Bluesky LinkedIn Reddit HN
read the original abstract

We introduce Meta MLGym and MLGym-Bench, a new framework and benchmark for evaluating and developing LLM agents on AI research tasks. This is the first Gym environment for machine learning (ML) tasks, enabling research on reinforcement learning (RL) algorithms for training such agents. MLGym-bench consists of 13 diverse and open-ended AI research tasks from diverse domains such as computer vision, natural language processing, reinforcement learning, and game theory. Solving these tasks requires real-world AI research skills such as generating new ideas and hypotheses, creating and processing data, implementing ML methods, training models, running experiments, analyzing the results, and iterating through this process to improve on a given task. We evaluate a number of frontier large language models (LLMs) on our benchmarks such as Claude-3.5-Sonnet, Llama-3.1 405B, GPT-4o, o1-preview, and Gemini-1.5 Pro. Our MLGym framework makes it easy to add new tasks, integrate and evaluate models or agents, generate synthetic data at scale, as well as develop new learning algorithms for training agents on AI research tasks. We find that current frontier models can improve on the given baselines, usually by finding better hyperparameters, but do not generate novel hypotheses, algorithms, architectures, or substantial improvements. We open-source our framework and benchmark to facilitate future research in advancing the AI research capabilities of LLM agents.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Forward citations

Cited by 28 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. One Run Is Not an Idea: The Implementation Lottery in Automated Research

    cs.MA 2026-07 conditional novelty 7.0

    In audits of 312 LLM research assignments, variation across implementations of the same idea dominates rerun noise and reverses the selected idea winner in 25.6-43.6% of decisions.

  2. NatureBench: Can Coding Agents Match the Published SOTA of Nature-Family Papers?

    cs.CL 2026-06 accept novelty 7.0

    Frontier coding agents surpass published Nature-family SOTA on only 17.8% of 90 sealed scientific tasks, mostly by recasting problems as supervised ML rather than inventing methods.

  3. NatureBench: Can Coding Agents Match the Published SOTA of Nature-Family Papers?

    cs.CL 2026-06 unverdicted novelty 7.0

    NatureBench evaluates ten frontier AI coding agents on 90 tasks from Nature papers under web-search-disabled conditions and finds the strongest agent surpasses published SOTA on only 17.8% of tasks, succeeding mainly ...

  4. Environment-Grounded Automated Prompt Optimization for LLM Game Agents

    cs.CL 2026-06 unverdicted novelty 7.0

    A multi-agent prompt optimization system using environment feedback improves LLM agent success rates on BabyAI tasks from 0% to 72.5% on challenging coordination tasks.

  5. TerraBench: Can Agents Reason Over Heterogeneous Earth-System Data?

    cs.AI 2026-06 unverdicted novelty 7.0

    TerraBench is a new benchmark with 403 tasks across Earth-science domains that evaluates LLM agents on coordinating heterogeneous data using executable ReAct-style workflows and process-level metrics.

  6. TerraBench: Can Agents Reason Over Heterogeneous Earth-System Data?

    cs.AI 2026-06 unverdicted novelty 7.0

    TerraBench provides 403 executable tasks across three tracks to evaluate agents on unified Earth-system reasoning with tool-use and tolerance-aware metrics.

  7. Benchmarking AI Agents for Addressing Scientific Challenges Across Scales

    cs.AI 2026-06 unverdicted novelty 7.0

    SciAgentArena is a new interactive benchmark for AI agents on scientific tasks that finds agents handle clear data-analysis workflows but struggle with novel insights, self-directed exploration, and open-ended questions.

  8. InquiTree: Evaluating AI Agents in the Scientific Inquiry Loop with Paper-Derived Research Trees

    cs.DB 2026-06 unverdicted novelty 7.0

    InquiTree shows LLM agents suffer from degrading critical capabilities during extended scientific interactions and perform worse on papers published after their training cutoffs.

  9. ResearchClawBench: A Benchmark for End-to-End Autonomous Scientific Research

    cs.LG 2026-05 conditional novelty 7.0

    ResearchClawBench supplies 40 grounded tasks and expert rubrics to measure autonomous research agents, with the strongest systems scoring only 21.5 and 20.7 on average.

  10. MLS-Bench: A Holistic and Rigorous Assessment of AI Systems on Building Better AI

    cs.LG 2026-05 unverdicted novelty 7.0

    MLS-Bench is a benchmark with 140 tasks that evaluates AI agents on inventing generalizable and scalable ML methods, finding they lag human performance especially in insight-driven invention rather than tuning.

  11. MLS-Bench: A Holistic and Rigorous Assessment of AI Systems on Building Better AI

    cs.LG 2026-05 accept novelty 7.0

    Current AI agents fail to reliably invent transferable ML methods on a controlled 140-task benchmark, and more test-time compute or context does not remove the scientific-judgment bottleneck.

  12. EO-Gym: A Multimodal, Interactive Environment for Earth Observation Agents

    cs.AI 2026-05 unverdicted novelty 7.0

    EO-Gym supplies an executable multimodal environment and 9k-trajectory benchmark that turns Earth Observation into a tool-using, multi-step reasoning task, revealing that current VLMs struggle on temporal and cross-se...

  13. Autoresearch with Coding Agents: Generalizers and Metric-Maximizers on Quran Recitation Data

    cs.SE 2026-07 conditional novelty 6.0

    Claude Code generalizes while OpenAI Codex memorizes evaluation rows under an ungated autoresearch score; disclosing a held-out set removes the memorization but not the optimization drive.

  14. SAGE: A Quantitative Evaluation of Socialized Evolution in Agent Ecosystems

    cs.AI 2026-06 unverdicted novelty 6.0

    SAGE compares social co-evolution against matched self-evolution across three arenas and finds peer history enables breakthroughs only for agents that plateau under self-improvement, with abstraction of traces matteri...

  15. ResearchClawBench: A Benchmark for End-to-End Autonomous Scientific Research

    cs.LG 2026-05 unverdicted novelty 6.0

    ResearchClawBench is a new benchmark that evaluates autonomous AI research agents on 40 tasks grounded in published papers using expert rubrics, finding that top systems score only 20-26 out of 100.

  16. MLReplicate: Benchmarking Autonomous Research Systems for Machine Learning Reproducibility

    cs.LG 2026-05 conditional novelty 6.0

    MLReplicate benchmark evaluates six autonomous systems on 45 manuscripts from ICML 2025 papers, finding that automated reviews accept flawed outputs with fabricated claims while human review exposes methodological fai...

  17. MLS-Bench: A Holistic and Rigorous Assessment of AI Systems on Building Better AI

    cs.LG 2026-05 unverdicted novelty 6.0

    MLS-Bench shows that current AI agents fall short of reliably inventing generalizable ML methods, with engineering tuning easier than genuine invention.

  18. Behavior Cue Reasoning: Monitorable Reasoning Improves Efficiency and Safety through Oversight

    cs.AI 2026-05 unverdicted novelty 6.0

    Behavior Cue Reasoning trains LLMs to emit special tokens before behaviors, enabling monitors to prune up to 50% of wasted tokens and recover safe actions from 80% of unsafe traces, more than doubling success rates wi...

  19. Behavior Cue Reasoning: Monitorable Reasoning Improves Efficiency and Safety through Oversight

    cs.AI 2026-05 conditional novelty 6.0

    Behavior Cue Reasoning trains LLMs to emit special tokens before behaviors, enabling monitors to cut up to 50% wasted reasoning tokens and recover safe actions from 80% of unsafe traces, more than doubling success rat...

  20. TREX: Automating LLM Fine-tuning via Agent-Driven Tree-based Exploration

    cs.AI 2026-04 unverdicted novelty 6.0

    TREX automates the LLM training lifecycle via collaborative agents and tree-based exploration, delivering consistent performance gains across 10 real-world fine-tuning tasks in FT-Bench.

  21. AI-Driven Research for Databases

    cs.DB 2026-04 unverdicted novelty 6.0

    Co-evolving LLM-generated solutions with their evaluators enables discovery of novel database algorithms that outperform state-of-the-art baselines, including a query rewrite policy with up to 6.8x lower latency.

  22. ResearchClawBench: A Benchmark for End-to-End Autonomous Scientific Research

    cs.LG 2026-05 unverdicted novelty 5.5

    A 40-task, 10-domain benchmark finds current auto-research agents and LLMs score only ~20–26 on re-discovering real published scientific artifacts.

  23. Discovering Crystal Structure Prediction Algorithms with an AI Co-Scientist

    cs.LG 2026-06 unverdicted novelty 5.0

    HACO adapts MaskGIT from vision into MaskGXT with symmetry tokens and stratified sampling, reaching 79.06% METRe accuracy on MP-20 polymorph split versus 70.87% for the best baseline.

  24. AgentCE-Bench: Agent Configurable Evaluation with Scalable Horizons and Controllable Difficulty under Lightweight Environments

    cs.AI 2026-04 unverdicted novelty 5.0

    AgentCE-Bench is a lightweight grid-planning benchmark that controls task horizon via hidden slots H and difficulty via decoy budget B, validated across 13 models for consistent and discriminative evaluation.

  25. A Comprehensive Survey of Self-Evolving AI Agents: A New Paradigm Bridging Foundation Models and Lifelong Agentic Systems

    cs.AI 2025-08 unverdicted novelty 5.0

    A comprehensive review of self-evolving AI agents that improve themselves over time, organized via a framework of inputs, agent system, environment, and optimizers, with domain-specific and safety discussions.

  26. AI for Auto-Research: Roadmap & User Guide

    cs.AI 2026-05 unverdicted novelty 4.0

    The paper delivers a stage-by-stage roadmap for AI in research, showing reliable assistance in retrieval and tool tasks but fragility in novelty and judgment, advocating human-governed collaboration.

  27. AI for Auto-Research: Roadmap & User Guide

    cs.AI 2026-05 conditional novelty 4.0

    AI can generate research artifacts faster than it can verify them, so across all eight lifecycle stages the credible deployment mode is human-governed collaboration rather than full autonomy.

  28. From LLM Reasoning to Autonomous AI Agents: A Comprehensive Review

    cs.AI 2025-04 accept novelty 4.0

    A survey consolidating benchmarks, agent frameworks, real-world applications, and protocols for LLM-based autonomous agents into a proposed taxonomy with recommendations for future research.