Nemo Skills

[!NOTE] Benchmarks and rollouts are moving to NeMo-Gym. We encourage you to move your rollout workflows over to NeMo-Gym, and to implement new benchmarks there rather than in Nemo-Skills.

Nemo-Skills will continue to add support for running NeMo-Gym benchmarks, so you can run them with the same cluster configs, server configurations, and slurm setup you already use. The benchmark implementation itself should live in NeMo-Gym. An early version of this exists today as ns nemo_gym_rollouts, but the interface is experimental and will likely change.

Nemo-Skills is a collection of pipelines to improve "skills" of large language models (LLMs). We support everything needed for LLM development, from synthetic data generation, to model training, to evaluation on a wide range of benchmarks. Start developing on a local workstation and move to a large-scale Slurm cluster with just a one-line change.

Here are some of the features we support:

• Flexible LLM inference:
  • Seamlessly switch between API providers, local server and large-scale slurm jobs for LLM inference.
  • Host models (on 1 or many nodes) with TensorRT-LLM, vLLM, sglang or Megatron.
  • Scale SDG jobs from 1 GPU on a local machine all the way to tens of thousands of GPUs on a slurm cluster.
• Model evaluation:
  • Evaluate your models on many popular benchmarks.
    • Math (natural language): e.g. aime24, aime25, hmmt_feb25
    • Math (formal language): e.g. minif2f, proofnet, putnam-bench
    • Code: e.g. swe-bench, livecodebench, bird
    • Scientific knowledge: e.g., hle, scicode, gpqa
    • Instruction following: e.g. ifbench, ifeval
    • Long-context: e.g. ruler, mrcr, aalcr, longbench-v2
    • Tool-calling: e.g. bfcl_v3
    • Multilingual: e.g. mmlu-prox, flores-200, wmt24pp
    • Speech & Audio: e.g. asr-leaderboard, mmau-pro
    • Vision-Language Models (VLM): e.g. mmmu-pro
  • Easily parallelize each evaluation across many slurm jobs, self-host LLM judges, bring your own prompts or change benchmark configuration in any other way.
• Model training: Train models using NeMo-RL or verl.

News

• [12/15/2025]: Released the recipe for reproducing Nemotron-Math-v2 and Nemotron-Math-Proofs-v1 datasets that were used as part of the training data for NVIDIA-Nemotron-3-Nano-30B-A3B-BF16.

• [11/25/2025]: Added the recipe for reproducing the main experimental results for Scaling Generative Verifiers For Natural Language Mathematical Proof Verification And Selection.

• [08/22/2025]: Added details for reproducing evals for the NVIDIA-Nemotron-Nano-9B-v2 model by NVIDIA.

• [08/15/2025]: Added details for reproducing evals for the Llama-3_3-Nemotron-Super-49B-v1_5 model by NVIDIA.

• [07/30/2025]: The datasets used to train OpenReasoning models are released! Math and code are available as part of Nemotron-Post-Training-Dataset-v1 and science is available in OpenScienceReasoning-2. See our documentation for more details.

• [07/18/2025]: We released OpenReasoning models! SOTA scores on math, coding and science benchmarks.

• [04/23/2025]: We released OpenMathReasoning dataset and models!

  • OpenMathReasoning dataset has 306K unique mathematical problems sourced from AoPS forums with:
    • 3.2M long chain-of-thought (CoT) solutions
    • 1.7M long tool-integrated reasoning (TIR) solutions
    • 566K samples that select the most promising solution out of many candidates (GenSelect)
  • OpenMath-Nemotron models are SoTA open-weight models on math reasoning benchmarks at the time of release!

• [10/03/2024]: We released OpenMathInstruct-2 dataset and models!

  • OpenMathInstruct-2 is a math instruction tuning dataset with 14M problem-solution pairs generated using the Llama3.1-405B-Instruct model.
  • OpenMath-2-Llama models show significant improvements compared to their Llama3.1-Instruct counterparts.

Getting started

To get started, follow these steps, browse available pipelines or run ns --help to see all available commands and their options.

You can find more examples of how to use Nemo-Skills in the tutorials page.

We've built and released many popular models and datasets using Nemo-Skills. See all of them in the Papers & Releases documentation.

You can find the full documentation here.

Contributing

We welcome contributions to Nemo-Skills! Please see our Contributing Guidelines for more information on how to get involved.

Disclaimer: This project is strictly for research purposes, and not an official product from NVIDIA.