NVIDIA-Nemotron-3-Ultra-550B-A55B-Base-BF16

Model Overview

Model Developer: NVIDIA Corporation

Model Dates:

December 2025 - April 2026

Data Freshness:

  • The pre-training data has a cutoff date of September 2025.

Description

NVIDIA-Nemotron-3-Ultra-550B-A55B-Base-BF16 is a large language model (LLM) trained by NVIDIA.

The model employs a hybrid Latent Mixture-of-Experts (LatentMoE) architecture, utilizing interleaved Mamba-2 and MoE layers, along with select Attention layers. Distinct from the Nano model, the Ultra model incorporates Multi-Token Prediction (MTP) layers for faster text generation and improved quality, and it is pre-trained using an NVFP4 recipe to maximize compute efficiency. The model has 55B active parameters and 550B parameters in total.

The supported languages include: English, French, Spanish, Italian, German, Japanese, Hindi, Korean, Brazilian Portuguese, and Chinese.

This model is ready for commercial and non-commercial use.

What is Nemotron?

NVIDIA Nemotron™ is a family of open models with open weights, training data, and recipes, delivering leading efficiency and accuracy for building specialized AI agents.

License/Terms of Use

Use of this model is governed by the OpenMDW License Agreement, version 1.1 (OpenMDW-1.1).

Benchmarks

Task Metric Nemotron-3-Ultra
550B-A55B-Base
DeepSeek-V3.2
Exp-Base
Mistral-Large-3
675B-Base-2512
Kimi-K2
Base
GLM-4.5
Base
General Knowledge
MMLU 5-shot, acc 89.08 87.82 87.35 87.60 86.50
MMLU-Pro 5-shot, CoT EM 79.07 63.26 67.42 69.15 65.78
AGIEval-En 3/5-shot, CoT EM 78.73 70.13 69.30 72.55 70.06
GPQA 5-shot, CoT EM 50.00 31.82 34.85 43.43 34.85
Math
GSM8K 8-shot, CoT EM 88.10 84.38 91.21 91.05 85.37
MATH 4-shot, EM 82.00 60.12 62.88 68.40 57.58
Code
HumanEval sampled pass@1 n=32, EvalPlus sanitized 83.84 61.85 66.71 78.20 78.16
MBPP-Sanitized 3-shot pass@1 n=32, EvalPlus sanitized 85.97 58.66 84.08 72.14 76.69
Commonsense Understanding
ARC-Challenge 25-shot, acc_norm 97.35 95.22 97.27 95.82 96.59
HellaSwag 10-shot, acc_norm 90.51 89.44 88.88 90.92 90.17
OpenBookQA 0-shot, acc_norm 48.60 48.20 51.40 50.80 49.60
PIQA 0-shot, acc_norm 83.79 85.09 84.82 85.47 85.09
WinoGrande 5-shot, acc 79.32 83.43 82.08 84.21 85.24
Reading Comprehension
RACE 0-shot, acc 92.15 93.21 93.30 91.96 92.15
Multilingual
MMLU Global Lite 5-shot, avg 90.13 85.59 87.34 85.63 85.81
MGSM 8-shot, native CoT avg 87.73 82.33 82.93 85.20 81.27
Long Context
RULER 64K 0-shot 95.30 93.30 90.11 93.79 16.12
RULER 128K 0-shot 92.49 91.88 55.77 88.61 0.00
RULER 256K 0-shot 86.22 -- 35.50 -- --
RULER 512K 0-shot 84.54 -- -- -- --
RULER 1M 0-shot 76.83 -- -- -- --

Comparison of Nemotron-3-Ultra-550B-A55B-Base, DeepSeek-V3.2-Exp-Base, Mistral-Large-3-675B-Base-2512, Kimi-K2-Base, and GLM-4.5-Base. Best available results are marked in bold.

All evaluation results were collected via Nemo Evaluator SDK and NVIDIA's open source container of LM Evaluation Harness, unless otherwise stated. For reproducibility purposes, more details on the evaluation settings can be found in the Nemo Evaluator SDK examples folder and the reproducibility tutorial for Nemotron 3 Ultra. The open source container on LM Evaluation Harness packaged via NVIDIA's Nemo Evaluator SDK used for evaluations can be found here.

Deployment Geography: Global

Use Case

This model is intended for developers and researchers building LLMs.

Release Date

Hugging Face - 06/04/2026 via Hugging Face

Reference(s)

Model Architecture

  • Architecture Type: Mamba2-Transformer Hybrid Latent Mixture of Experts (LatentMoE) with Multi-Token Prediction (MTP)
  • Network Architecture: Nemotron Hybrid LatentMoE
  • Number of model parameters: 550B Total / 55B Active

Model Design

The model was pre-trained with around 20T tokens and supports up to 1M context length. The pre-training phase used an NVFP4 recipe. It utilizes the LatentMoE architecture, where tokens are projected into a smaller latent dimension for expert routing and computation, improving accuracy per byte. The model includes Multi-Token Prediction (MTP) layers, which predict multiple future tokens to provide richer training signals and enable faster inference via speculative decoding.

Training Methodology

Stage 1: Pre-Training

  • NVIDIA-Nemotron-3-Ultra-550B-A55B-Base-BF16 model was pre-trained using an NVFP4 recipe with crawled and synthetic code, math, science, and general knowledge data.

  • Software used for pre-training: Megatron-LM

NVIDIA-Nemotron-3-Ultra-550B-A55B-Base-BF16 model is a result of the above work.

Input

  • Input Type(s): Text
  • Input Format(s): String
  • Input Parameters: One-Dimensional (1D): Sequences
  • Other Properties Related to Input: Maximum context length up to 1M tokens. Supported languages include: English, French, Spanish, Italian, German, Japanese, Korean, Hindi, Korean, Brazilian Portuguese, and Chinese

Output

  • Output Type(s): Text
  • Output Format: String
  • Output Parameters: One-Dimensional (1D): Sequences
  • Other Properties Related to Output: Maximum context length up to 1M tokens

Our AI models are designed and optimized to run on NVIDIA GPU-accelerated systems. By leveraging NVIDIA's hardware (e.g. GPU cores) and software frameworks (e.g., CUDA libraries), the model achieves faster training and inference times compared to CPU-only solutions.

Software Integration

  • Runtime Engine(s): NeMo 26.04.01
  • Supported Hardware Microarchitecture Compatibility: NVIDIA Ampere - A100; NVIDIA Blackwell; NVIDIA Hopper - H100-80GB
  • Operating System(s): Linux

The integration of foundation and fine-tuned models into AI systems requires additional testing using use-case-specific data to ensure safe and effective deployment. Following the V-model methodology, iterative testing and validation at both unit and system levels are essential to mitigate risks, meet technical and functional requirements, and ensure compliance with safety and ethical standards before deployment.

Model Version(s)

  • v1.0 - GA

Training and Evaluation Datasets:

Training

Data Modality: Text

The total size: 53.8 TiB (14.8 trillion tokens)

Total number of datasets: 131

Dataset partition: Training [100%], testing [0%], validation [0%]

Time period for training data collection: 2013 to 2025

Time period for testing data collection: 2013 to 2025

Time period for validation data collection: 2013 to 2025

Data Collection Method by dataset: Hybrid: Automated, Human, Synthetic

Labeling Method by dataset: Hybrid: Automated, Human, Synthetic

Properties: NVIDIA-Nemotron-3-Ultra-550B-A55B-Base is pre-trained on a large corpus of high-quality curated and synthetically-generated data. It is trained in the English language, as well as 11 other languages and 43 programming languages. Our sources cover a variety of document types such as: webpages, dialogue, articles, and other written materials. The corpus spans domains including legal, math, science, finance, and more. We also include a small portion of question-answering, and alignment style data to improve model accuracy. The model was trained for approximately 20T tokens.

More details on the datasets and synthetic data generation methods can be found in the technical report NVIDIA Nemotron 3 Ultra.

For Detailed Dataset Information: Click here!

Base Pre-Training Corpus (Nemotron 3 Foundation)

The foundation of the model is trained on the Nemotron-3-Ultra corpus, comprising the following datasets from the Nemotron Pre-Training Datasets collection:

Dataset Collection Token Counts Description
Nemotron-CC-v2 & v2.1 9.1T A massive collection of English web data filtered from Common Crawl, including 2.5T+ tokens of new organic, translated, and synthetically rephrased content.
Nemotron-CC-Code-v1 427.9B High-quality code tokens extracted from Common Crawl using the Lynx + LLM pipeline to preserve structure and equations.
Nemotron-Pretraining-Code-v1 & v2 & v3 1.7T Curated GitHub code references with multi-stage filtering, deduplication, and large-scale synthetic code data.
Nemotron-CC-Math-v1 133.3B High-quality math pre-training dataset preserving LaTeX formatting and mathematical structures.
Nemotron-Pretraining-Specialized-v1 & v1.1 & v1.2 & Nemotron-Pretraining-SFT-v1 660.0B Synthetic datasets targeting specialized domains such as STEM reasoning and scientific coding.
Nemotron-Pretraining-Legal-v1 4.3B Synthetic datasets targeting the legal domain.

Public Datasets

Dataset Collection Period
GSM8K 4/23/2025
CC-NEWS 4/23/2025
Common Crawl 4/23/2025
Wikimedia 4/23/2025
Bespoke-Stratos-17k 4/23/2025
tigerbot-kaggle-leetcodesolutions-en-2k 4/23/2025
glaive-function-calling-v2 4/23/2025
APIGen Function-Calling 4/23/2025
LMSYS-Chat-1M 4/23/2025
Open Textbook Library - CC BY-SA & GNU subset and OpenStax - CC BY-SA subset 4/23/2025
Advanced Reasoning Benchmark, tigerbot-kaggle-leetcodesolutions-en-2k, PRM800K, and SciBench 4/23/2025
FineWeb-2 4/23/2025
Court Listener Legacy Download
peS2o Legacy Download
OpenWebMath Legacy Download
BioRxiv Legacy Download
PMC Open Access Subset Legacy Download
OpenWebText2 Legacy Download
Stack Exchange Data Dump Legacy Download
PubMed Abstracts Legacy Download
NIH ExPorter Legacy Download
arXiv Legacy Download
BigScience Workshop Datasets Legacy Download
Reddit Dataset Legacy Download
SEC's Electronic Data Gathering, Analysis, and Retrieval (EDGAR) Legacy Download
Advanced Mathematical Problem Solving Legacy Download
MathPile Legacy Download
NuminaMath CoT Legacy Download
PMC Article Legacy Download
FLAN Legacy Download
Advanced Reasoning Benchmark Legacy Download
SciBench Legacy Download
WikiTableQuestions Legacy Download
FinQA Legacy Download
Riddles Legacy Download
Problems in Elementary Mathematics for Home Study Legacy Download
MedMCQA Legacy Download
Cosmos QA Legacy Download
MCTest Legacy Download
AI2's Reasoning Challenge Legacy Download
OpenBookQA Legacy Download
MMLU Auxiliary Train Legacy Download
social-chemestry-101 Legacy Download
Moral Stories Legacy Download
The Common Pile v0.1 Legacy Download
FineMath Legacy Download
MegaMath Legacy Download
MegaMath Legacy Download
MultiverseMathHard 10/2/2025
News Commentary 10/2/2025
Essential-Web 10/2/2025
finepdfs 10/2/2025
HotpotQA 10/2/2025
SQuAD2.0 10/2/2025
NLTK Words Lists 10/2/2025

Crawled and Scraped from Online Sources by NVIDIA

The English Common Crawl data was downloaded from the Common Crawl Foundation (see their FAQ for details on their crawling) and includes the snapshots CC-MAIN-2013-20 through CC-MAIN-2025-13. The data was subsequently deduplicated and filtered in various ways described in the Nemotron-CC paper. Additionally, we extracted data for fifteen languages from the following three Common Crawl snapshots: CC-MAIN-2024-51, CC-MAIN-2025-08, CC-MAIN-2025-18. The fifteen languages included were Arabic, Chinese, Danish, Dutch, French, German, Italian, Japanese, Korean, Polish, Portuguese, Russian, Spanish, Swedish, and Thai. As we did not have reliable multilingual model-based quality classifiers available, we applied just heuristic filtering instead—similar to what we did for lower quality English data in the Nemotron-CC pipeline, but selectively removing some filters for some languages that did not work well. Deduplication was done in the same way as for Nemotron-CC.

The GitHub Crawl was collected using the GitHub REST API and the Amazon S3 API. Each crawl was operated in accordance with the rate limits set by its respective source, either GitHub or S3. We collect raw source code and subsequently remove any having a license which does not exist in our permissive-license set (for additional details, refer to the technical report).

Dataset Modality Dataset Size Collection Period Collecting Organisation
English Common Crawl Text 3.36T 4/8/2025 NVIDIA Advanced Deep Learning Research
English Common Crawl 1.1 Text Not disclosed 10/2/2025 NVIDIA Advanced Deep Learning Research
Multilingual Common Crawl Text 812.7B 5/1/2025 NVIDIA Advanced Deep Learning Research
GitHub Crawl Text 747.4B 4/29/2025 NVIDIA Advanced Deep Learning Research
GitHub Crawl 1.1 Text 172.7B 9/30/2025 NVIDIA Advanced Deep Learning Research

Private Non-publicly Accessible Datasets of Third Parties

Dataset Model(s) used
Global Regulation Unknown
TAUS Translation Memory Unknown
Scale HLE Unknown
HackerRank Coding Unknown
RL data for Search Gemini 3; GPT-5

Private Non-publicly Accessible Datasets by NVIDIA

Dataset Model(s) used
Simple Minesweeper -
Simple Sudoku -
Multitool Typewriter Hard -
Machine Translation of News Commentary and TAUS Translation Memory -
Machine Translation of STEM - Qwen2.5-14B-Instruct
Competitive Coding RL data from Nemotron Cascade -
Long context RL -
Single-step SWE RL for patch generation -
OpenHands SWE -

NVIDIA-Sourced Synthetic Datasets

Dataset Modality Dataset Size Seed Dataset Model(s) used for generation
Nemotron-Pretraining-Fact-Seeking Text 35.0B FineWiki Qwen3-30B-A3B-Instruct-2507
Nemotron-Pretraining-Legal Text 4.3B CommonPile (caselaw_access_project_filtered); California Code of Regulations; Judicial Ethics Opinions; GLOBALCIT; CUAD; Nemotron Personas; ToSDR Terms of Service Corpus; CodeHima/TOS_Dataset; ContractNLI; CaseHOLD; Code of Federal Regulations; Canadian Case Law (subsets that allow commercial use) Qwen3-235B-A22B-Thinking-2507
Nemotron-Pretraining-Formal-Logic Text 128M Nemotron Personas Qwen3-235B-A22B-Thinking-2507
Nemotron-Pretraining-Economics Text 73.4M - Qwen3-235B-A22B-Thinking-2507
Nemotron-Pretraining-Multiple-Choice Text 1.6B MMLU Auxiliary Train DeepSeek-V3; Qwen3-235B-A22B
Nemotron-Pretraining-Code-Concepts Text 7.3B - gpt-oss-20b; gpt-oss-120b
Nemotron-Pretraining-Unconditional-Algorithmic Text 196.5M - gpt-oss-120b; Qwen3-235B-A22B
More Synthetic Tasks from DeepSeek-V3 and Qwen3-235B-A22B Text 1.1B train splits of acp_bench; ai2_arc; babi; gsm8k; hendrycks_math; IFEval; MedText; mediqa_qa; mlqa; MMLU-Pro; mmlu-pro-plus; MMLU-ProX; nq_open; tinyGSM8k; truthful_qa; truthfulqa-multi; MATH-lighteval; mmlu; awesome-chatgpt-prompts; super_glue DeepSeek v3; Qwen3-235B-A22B
Synthetic Tasks from DeepSeek-V3 and Qwen3-235B-A22B Text 6.7B train splits of Into the Unknown; AI2 ARC (AI2 Reasoning Challenge); BLiMP (Benchmark of Linguistic Minimal Pairs); CommonSenseQA; GLUE; HeadQA; Hendrycks Ethics; Memo Trap; modus-tollens; NeQA; pattern-matching-suppression; mastermind_24_mcq_random; mastermind_24_mcq_close; quote-repetition; redefine-math; Repetitive Algebra; sig-figs; MMLU-Pro; MC-TACO; MedConceptsQA; MMLU_dataset; OpenbooksQA; PIQA (Physical Interaction Question Answering); SocialIQA; SuperGLUE; tinyAI2_arc; tinyMMLU; tinyWinogrande; TruthfulQA; WebQuestions; Winogrande; GPQA; MBPP DeepSeek v3; Qwen3-235B-A22B
Synthetic Art of Problem Solving from DeepSeek-R1 Text 40B Art of Problem Solving; American Mathematics Competitions 8; American Mathematics Competitions 10; DeepSeek-R1
Synthetic Moral Stories and Social Chemistry from Qwen3-235B-A22B-Thinking-2507 and Mixtral-8x22B-v0.1 Text 15.2M social-chemestry-101; Moral Stories Qwen3-235B-A22B-Thinking-2507; Mixtral-8x22B-v0.1
Synthetic Moral Stories and Social Chemistry from Mixtral-8x22B-v0.1 Text 327M social-chemestry-101; Moral Stories Mixtral-8x22B-v0.1
Synthetic Social Sciences seeded with OpenStax from DeepSeek-V3, Mixtral-8x22B-v0.1, and Qwen2.5-72B Text 83.6M OpenStax - CC BY-SA subset DeepSeek-V3; Mixtral-8x22B-v0.1; Qwen2.5-72B
Synthetic Health Sciences seeded with OpenStax from DeepSeek-V3, Mixtral-8x22B-v0.1, and Qwen2.5-72B Text 9.7M OpenStax - CC BY-SA subset DeepSeek-V3; Mixtral-8x22B-v0.1; Qwen2.5-72B
Synthetic STEM seeded with OpenStax, Open Textbook Library, and GSM8K from DeepSeek-R1, DeepSeek-V3, DeepSeek-V3-0324, and Qwen2.5-72B Text 175M OpenStax - CC BY-SA subset; GSM8K; Open Textbook Library - CC BY-SA & GNU subset DeepSeek-R1, DeepSeek-V3; DeepSeek-V3-0324; Qwen2.5-72B
Nemotron-PrismMath Text 4.6B Big-Math-RL-Verified; OpenR1-Math-220k Qwen2.5-0.5B-instruct, Qwen2.5-72B-Instruct; DeepSeek-R1-Distill-Qwen-32B
Synthetic Question Answering Data from Papers and Permissible Books from Qwen2.5-72B-Instruct Text 350M arXiv; National Institutes of Health ExPorter; BioRxiv; PMC Article; USPTO Backgrounds; peS2o; Global Regulation; CORE; PG-19; DOAB CC BY & CC BY-SA subset; NDLTD Qwen2.5-72B-Instruct
Synthetic Rephrased Math Data from Common Crawl from phi-4 Text 73B Common Crawl phi-4
Synthetic Math Data from Common Crawl 4plus Text 52.3B Common Crawl phi-4
Synthetic Math Data from Common Crawl 3 Text 80.9B Common Crawl phi-4
Synthetic AGIEval seeded with AQUA-RAT, LogiQA, and AR-LSAT from DeepSeek-V3 and DeepSeek-V3-0324 Text 4.0B AQUA-RAT; LogiQA; AR-LSAT DeepSeek-V3; DeepSeek-V3-0324
Synthetic AGIEval seeded with AQUA-RAT, LogiQA, and AR-LSAT from Qwen3-30B-A3B Text 4.2B AQUA-RAT; LogiQA; AR-LSAT Qwen3-30B-A3B
Synthetic Art of Problem Solving from Qwen2.5-32B-Instruct, Qwen2.5-Math-72B, Qwen2.5-Math-7B, and Qwen2.5-72B-Instruct Text Art of Problem Solving; American Mathematics Competitions 8; American Mathematics Competitions 10; GSM8K; PRM800K Qwen2.5-32B-Instruct; Qwen2.5-Math-72B; Qwen2.5-Math-7B; Qwen2.5-72B-Instruct
Synthetic MMLU Auxiliary Train from DeepSeek-R1 Text 0.5B MMLU Auxiliary Train DeepSeek-R1
Synthetic Long Context Continued Post-Training Data from Papers and Permissible Books from Qwen2.5-72B-Instruct Text arXiv; National Institutes of Health ExPorter; BioRxiv; PMC Article; USPTO Backgrounds; peS2o; Global Regulation; CORE; PG-19; DOAB CC BY & CC BY-SA subset; NDLTD Qwen2.5-72B-Instruct
Synthetic Common Crawl from Qwen3-30B-A3B and Mistral-Nemo-12B-Instruct Text 415.8B Common Crawl Qwen3-30B-A3B; Mistral-NeMo-12B-Instruct
Synthetic Multilingual Data from Common Crawl from Qwen3-30B-A3B Text Common Crawl Qwen3-30B-A3B
Synthetic Multilingual Data from Wikimedia from Qwen3-30B-A3B Text Wikimedia Qwen3-30B-A3B
Synthetic Math Data from Wikimedia from Nemotron-4-340B-Instruct Text - Nemotron-4-340B-Instruct
Synthetic Common Crawl Code from phi-4 Text 427.9B Common Crawl phi-4
Synthetic Scientific Coding from Qwen3-235B-A22B Text 1.2B Wikimedia Qwen3-235B-A22B
Tool Calling Data Text 26.2B Qwen3-235B-A22B-2507; gpt-oss-120b
Synthetic Essential-Web from QwQ-32B Text 28.1B Essential-Web QwQ-32B
Translated Synthetic Crawl Text 389.9B Common Crawl Qwen3-30B-A3B
Translated Synthetic Wikipedia Text 7.9B Wikimedia Qwen3-30B-A3B
Synthetic Long Context from Qwen3-235B-A22B-Instruct-2507 Text Undisclosed CORE; PG-19; DOAB CC BY & CC BY-SA subset; NDLTD Qwen3-235B-A22B-Instruct-2507
Synthetic Search STEM OPENQ from DeepSeek-R1-0528 Text Undisclosed - DeepSeek-R1-0528
Synthetic MCQ from Qwen2.5-32B-Instruct and DeepSeek-R1-0528 Text Undisclosed - Qwen2.5-32B-Instruct; DeepSeek-R1-0528
Synthetic Offline Search MCQA HLE from DeepSeek-R1-0528 Text Undisclosed - DeepSeek-R1-0528
Synthetic Offline Search MCQA GPQA from Qwen3-235B-A22B and DeepSeek-R1-0528 Text Undisclosed - Qwen3-235B-A22B; DeepSeek-R1-0528
Synthetic Human Preference from QwQ-32B, Qwen3-30B-A3B, Qwen3-235B-A22B, Qwen3-235B-A22B-Instruct-2507, Mistral-Small-3.1-24B-Instruct-2503, Mistral-Small-3.2-24B-Instruct-2506, MiniMax-M1-80k, MiniMax-M1-40k, Kimi-K2-Instruct, DeepSeek-V3-0324, DeepSeek-R1-0528 Text Undisclosed - QwQ-32B; Qwen3-30B-A3B; Qwen3-235B-A22B; Qwen3-235B-A22B-Instruct-2507; Mistral-Small-3.1-24B-Instruct-2503; Mistral-Small-3.2-24B-Instruct-2506; MiniMax-M1-80k; MiniMax-M1-40k; Kimi-K2-Instruct; DeepSeek-V3-0324; DeepSeek-R1-0528
Synthetic Code from Qwen3-32B Text Undisclosed English Common Crawl; English Common Crawl 1.1 Qwen3-32B
Synthetic OpenCodeReasoning from DeepSeek-R1 Text Undisclosed OpenCodeReasoning DeepSeek-R1
Synthetic LIMO from DeepSeek-R1-0528 Text Undisclosed LIMO DeepSeek-R1-0528
Synthetic SCP from DeepSeek-R1-0528 Text Undisclosed SCP-116K DeepSeek-R1-0528
Synthetic Stack Exchange from DeepSeek-R1-0528 Text Undisclosed Stack Exchange DeepSeek-R1-0528
Synthetic Common Crawl from Qwen3-30B-A3B Text Undisclosed Common Crawl Qwen3-30B-A3B
Synthetic Wikipedia from Qwen3-30B-A3B Text Undisclosed Wikimedia Qwen3-30B-A3B
Synthetic Essential-Web from Qwen3-30B-A3B and Qwen3-235B-A22B-Thinking-2507 Text Undisclosed Essential-Web Qwen3-30B-A3B; Qwen3-235B-A22B-Thinking-2507
Synthetic Textbook Math from Qwen3-30B-A3B, Qwen3-235B-A22B, phi-4 Text Undisclosed Common Crawl; FineMath Qwen3-30B-A3B; Qwen3-235B-A22B; phi-4
Synthetic Math and Code from DeepSeek-R1 and DeepSeek-R1-0528 Text Undisclosed Magicoder-Evol-Instruct-110K; opc-sft-stage2; TACO; OpenCodeReasoning; OpenMathReasoning; NuminaMath CoT DeepSeek-R1; DeepSeek-R1-0528

Testing Datasets:

Data Collection Method by dataset

  • Hybrid: Automated, Human, Synthetic

Labeling Method by dataset

  • Hybrid: Automated, Human, Synthetic

Properties: This corpus comprises a mix of high-quality standard benchmarks and test suites for modern agentic AI as outlined in the benchmark section of the model card.

Evaluation Datasets:

Data Collection Method by dataset

  • Hybrid: Automated, Human, Synthetic

Labeling Method by dataset

  • Hybrid: Automated, Human, Synthetic

Properties: This corpus comprises a mix of high-quality standard benchmarks and test suites for modern agentic AI as outlined in the benchmark section of the model card.

Inference

  • Test Hardware:
    • NVIDIA Hopper
      • H100
      • H200
    • NVIDIA Grace Blackwell
      • GB200
      • GB300
    • NVIDIA Blackwell
      • B200
      • B300

Ethical Considerations

NVIDIA believes Trustworthy AI is a shared responsibility and we have established policies and practices to enable development for a wide array of AI applications. When downloaded or used in accordance with our terms of service, developers should work with their internal model team to ensure this model meets requirements for the relevant industry and use case and addresses unforeseen product misuse.

We advise against circumvention of any provided safety guardrails contained in the Model without a substantially similar guardrail appropriate for your use case. For more details: Safety and Explainability subcards.For more detailed information on ethical considerations for this model, please see the Model Card++ Bias, and Privacy subcards.

Please report model quality, risk, security vulnerabilities or NVIDIA AI Concerns here.

Citation

@misc{nvidia_nemotron_3_ultra_2026,
  title  = {Nemotron 3 Ultra: Open, Efficient Mixture-of-Experts Hybrid Mamba-Transformer Model for Agentic Reasoning},
  author = {{NVIDIA}},
  year   = {2026},
  url    = {https://research.nvidia.com/labs/nemotron/files/NVIDIA-Nemotron-3-Ultra-Technical-Report.pdf},
  note   = {White Paper}
}
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