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arXiv · 2604.12374

Nemotron 3 Super: Open, Efficient Mixture-of-Experts Hybrid Mamba-Transformer Model for Agentic Reasoning

NVIDIA·:·Aakshita Chandiramani·Aaron Blakeman·Abdullahi Olaoye·Abhibha Gupta·Abhilash Somasamudramath·Abhinav Khattar·Adeola Adesoba·Adi Renduchintala·Adil Asif·Aditya Agrawal·Aditya Vavre·Ahmad Kiswani·Aishwarya Padmakumar·Ajay Hotchandani·Akanksha Shukla·Akhiad Bercovich·Aleksander Ficek·Aleksandr Shaposhnikov·Alex Gronskiy·Alex Kondratenko·Alex Neefus·Alex Steiner·Alex Yang·Alexander Bukharin·Alexander Young·Ali Hatamizadeh·Ali Taghibakhshi·Alina Galiautdinova·Alisa Liu·Alok Kumar·Ameya Sunil Mahabaleshwarkar·Amir Klein·Amit Zuker·Amnon Geifman·Anahita Bhiwandiwalla·Ananth Subramaniam·Andrew Tao·Anjaney Shrivastava·Anjulie Agrusa·Ankur Srivastava·Ankur Verma·Ann Guan·Anna Shors·Annamalai Chockalingam·Anubhav Mandarwal·Aparnaa Ramani·Arham Mehta·Arti Jain·Arun Venkatesan·Asha Anoosheh·Ashwath Aithal·Ashwin Poojary·Asif Ahamed·Asit Mishra·Asli Sabanci Demiroz·Asma Kuriparambil Thekkumpate·Atefeh Sohrabizadeh·Avinash Kaur·Ayush Dattagupta·Barath Subramaniam Anandan·Bardiya Sadeghi·Barnaby Simkin·Ben Lanir·Benedikt Schifferer·Benjamin Chislett·Besmira Nushi·Bilal Kartal·Bill Thiede·Bita Darvish Rouhani·Bobby Chen·Boris Ginsburg·Brandon Norick·Branislav Kisacanin·Brian Yu·Bryan Catanzaro·Buvaneswari Mani·Carlo del Mundo·Chankyu Lee·Chanran Kim·Chantal Hwang·Chao Ni·Charles Wang·Charlie Truong·Cheng-Ping Hsieh·Chenhan Yu·Chenjie Luo·Cherie Wang·Chetan Mungekar·Chintan Patel·Chris Alexiuk·Chris Holguin·Chris Wing·Christian Munley·Christopher Parisien·Chuck Desai·Chunyang Sheng·Collin Neale·Cyril Meurillon
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Abstract

We describe the pre-training, post-training, and quantization of Nemotron 3 Super, a 120 billion (active 12 billion) parameter hybrid Mamba-Attention Mixture-of-Experts model. Nemotron 3 Super is the first model in the Nemotron 3 family to 1) be pre-trained in NVFP4, 2) leverage LatentMoE, a new Mixture-of-Experts architecture that optimizes for both accuracy per FLOP and accuracy per parameter, and 3) include MTP layers for inference acceleration through native speculative decoding. We pre-trained Nemotron 3 Super on 25 trillion tokens followed by post-training using supervised fine tuning (SFT) and reinforcement learning (RL). The final model supports up to 1M context length and achieves comparable accuracy on common benchmarks, while also achieving up to 2.2x and 7.5x higher inference throughput compared to GPT-OSS-120B and Qwen3.5-122B, respectively. Nemotron 3 Super datasets, along with the base, post-trained, and quantized checkpoints, are open-sourced on HuggingFace.

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NVIDIA, :, Aakshita Chandiramani, Aaron Blakeman, Abdullahi Olaoye, Abhibha Gupta, Abhilash Somasamudramath, Abhinav Khattar, Adeola Adesoba, Adi Renduchintala, Adil Asif, Aditya Agrawal, Aditya Vavre, Ahmad Kiswani, Aishwarya Padmakumar, Ajay Hotchandani, Akanksha Shukla, Akhiad Bercovich, Aleksander Ficek, Aleksandr Shaposhnikov, Alex Gronskiy, Alex Kondratenko, Alex Neefus, Alex Steiner, Alex Yang, Alexander Bukharin, Alexander Young, Ali Hatamizadeh, Ali Taghibakhshi, Alina Galiautdinova, Alisa Liu, Alok Kumar, Ameya Sunil Mahabaleshwarkar, Amir Klein, Amit Zuker, Amnon Geifman, Anahita Bhiwandiwalla, Ananth Subramaniam, Andrew Tao, Anjaney Shrivastava, Anjulie Agrusa, Ankur Srivastava, Ankur Verma, Ann Guan, Anna Shors, Annamalai Chockalingam, Anubhav Mandarwal, Aparnaa Ramani, Arham Mehta, Arti Jain, Arun Venkatesan, Asha Anoosheh, Ashwath Aithal, Ashwin Poojary, Asif Ahamed, Asit Mishra, Asli Sabanci Demiroz, Asma Kuriparambil Thekkumpate, Atefeh Sohrabizadeh, Avinash Kaur, Ayush Dattagupta, Barath Subramaniam Anandan, Bardiya Sadeghi, Barnaby Simkin, Ben Lanir, Benedikt Schifferer, Benjamin Chislett, Besmira Nushi, Bilal Kartal, Bill Thiede, Bita Darvish Rouhani, Bobby Chen, Boris Ginsburg, Brandon Norick, Branislav Kisacanin, Brian Yu, Bryan Catanzaro, Buvaneswari Mani, Carlo del Mundo, Chankyu Lee, Chanran Kim, Chantal Hwang, Chao Ni, Charles Wang, Charlie Truong, Cheng-Ping Hsieh, Chenhan Yu, Chenjie Luo, Cherie Wang, Chetan Mungekar, Chintan Patel, Chris Alexiuk, Chris Holguin, Chris Wing, Christian Munley, Christopher Parisien, Chuck Desai, Chunyang Sheng, Collin Neale, Cyril Meurillon. 2026-04-14. Nemotron 3 Super: Open, Efficient Mixture-of-Experts Hybrid Mamba-Transformer Model for Agentic Reasoning. https://arxiv.org/abs/2604.12374

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