Nemotron 3 Nano: Open, Efficient Mixture-of-Experts Hybrid Mamba-Transformer Model for Agentic Reasoning
Computation and Language
2025-12-25 v1 Artificial Intelligence
Machine Learning
Abstract
We present Nemotron 3 Nano 30B-A3B, a Mixture-of-Experts hybrid Mamba-Transformer language model. Nemotron 3 Nano was pretrained on 25 trillion text tokens, including more than 3 trillion new unique tokens over Nemotron 2, followed by supervised fine tuning and large-scale RL on diverse environments. Nemotron 3 Nano achieves better accuracy than our previous generation Nemotron 2 Nano while activating less than half of the parameters per forward pass. It achieves up to 3.3x higher inference throughput than similarly-sized open models like GPT-OSS-20B and Qwen3-30B-A3B-Thinking-2507, while also being more accurate on popular benchmarks. Nemotron 3 Nano demonstrates enhanced agentic, reasoning, and chat abilities and supports context lengths up to 1M tokens. We release both our pretrained Nemotron 3 Nano 30B-A3B Base and post-trained Nemotron 3 Nano 30B-A3B checkpoints on Hugging Face.
Keywords
Cite
@article{arxiv.2512.20848,
title = {Nemotron 3 Nano: Open, Efficient Mixture-of-Experts Hybrid Mamba-Transformer Model for Agentic Reasoning},
author = {NVIDIA and : and Aaron Blakeman and Aaron Grattafiori and Aarti Basant and Abhibha Gupta and Abhinav Khattar and Adi Renduchintala and Aditya Vavre and Akanksha Shukla and Akhiad Bercovich and Aleksander Ficek and Aleksandr Shaposhnikov and Alex Kondratenko and Alexander Bukharin and Alexandre Milesi and Ali Taghibakhshi and Alisa Liu and Amelia Barton and Ameya Sunil Mahabaleshwarkar and Amir Klein and Amit Zuker and Amnon Geifman and Amy Shen and Anahita Bhiwandiwalla and Andrew Tao and Ann Guan and Anubhav Mandarwal and Arham Mehta and Ashwath Aithal and Ashwin Poojary and Asif Ahamed and Asma Kuriparambil Thekkumpate and Ayush Dattagupta and Banghua Zhu and Bardiya Sadeghi and Barnaby Simkin and Ben Lanir and Benedikt Schifferer and Besmira Nushi and Bilal Kartal and Bita Darvish Rouhani and Boris Ginsburg and Brandon Norick and Brandon Soubasis and Branislav Kisacanin and Brian Yu and Bryan Catanzaro and Carlo del Mundo and Chantal Hwang and Charles Wang and Cheng-Ping Hsieh and Chenghao Zhang and Chenhan Yu and Chetan Mungekar and Chintan Patel and Chris Alexiuk and Christopher Parisien and Collin Neale and Damon Mosk-Aoyama and Dan Su and Dane Corneil and Daniel Afrimi and Daniel Rohrer and Daniel Serebrenik and Daria Gitman and Daria Levy and Darko Stosic and David Mosallanezhad and Deepak Narayanan and Dhruv Nathawani and Dima Rekesh and Dina Yared and Divyanshu Kakwani and Dong Ahn and Duncan Riach and Dusan Stosic and Edgar Minasyan and Edward Lin and Eileen Long and Eileen Peters Long and Elena Lantz and Ellie Evans and Elliott Ning and Eric Chung and Eric Harper and Eric Tramel and Erick Galinkin and Erik Pounds and Evan Briones and Evelina Bakhturina and Faisal Ladhak and Fay Wang and Fei Jia and Felipe Soares and Feng Chen and Ferenc Galko and Frankie Siino and Gal Hubara Agam and Ganesh Ajjanagadde and Gantavya Bhatt and Gargi Prasad and George Armstrong and Gerald Shen and Gorkem Batmaz and Grigor Nalbandyan and Haifeng Qian and Harsh Sharma and Hayley Ross and Helen Ngo and Herman Sahota and Hexin Wang and Himanshu Soni and Hiren Upadhyay and Huizi Mao and Huy C Nguyen and Huy Q Nguyen and Iain Cunningham and Ido Shahaf and Igor Gitman and Ilya Loshchilov and Ivan Moshkov and Izzy Putterman and Jan Kautz and Jane Polak Scowcroft and Jared Casper and Jatin Mitra and Jeffrey Glick and Jenny Chen and Jesse Oliver and Jian Zhang and Jiaqi Zeng and Jie Lou and Jimmy Zhang and Jining Huang and Joey Conway and Joey Guman and John Kamalu and Johnny Greco and Jonathan Cohen and Joseph Jennings and Joyjit Daw and Julien Veron Vialard and Junkeun Yi and Jupinder Parmar and Kai Xu and Kan Zhu and Kari Briski and Katherine Cheung and Katherine Luna and Keshav Santhanam and Kevin Shih and Kezhi Kong and Khushi Bhardwaj and Krishna C. Puvvada and Krzysztof Pawelec and Kumar Anik and Lawrence McAfee and Laya Sleiman and Leon Derczynski and Li Ding and Lucas Liebenwein and Luis Vega and Maanu Grover and Maarten Van Segbroeck and Maer Rodrigues de Melo and Makesh Narsimhan Sreedhar and Manoj Kilaru and Maor Ashkenazi and Marc Romeijn and Mark Cai and Markus Kliegl and Maryam Moosaei and Matvei Novikov and Mehrzad Samadi and Melissa Corpuz and Mengru Wang and Meredith Price and Michael Boone and Michael Evans and Miguel Martinez and Mike Chrzanowski and Mohammad Shoeybi and Mostofa Patwary and Nabin Mulepati and Natalie Hereth and Nave Assaf and Negar Habibi and Neta Zmora and Netanel Haber and Nicola Sessions and Nidhi Bhatia and Nikhil Jukar and Nikki Pope and Nikolai Ludwig and Nima Tajbakhsh and Nirmal Juluru and Oleksii Hrinchuk and Oleksii Kuchaiev and Olivier Delalleau and Oluwatobi Olabiyi and Omer Ullman Argov and Ouye Xie and Parth Chadha and Pasha Shamis and Pavlo Molchanov and Pawel Morkisz and Peter Dykas and Peter Jin and Pinky Xu and Piotr Januszewski and Pranav Prashant Thombre and Prasoon Varshney and Pritam Gundecha and Qing Miao and Rabeeh Karimi Mahabadi and Ran El-Yaniv and Ran Zilberstein and Rasoul Shafipour and Rich Harang and Rick Izzo and Rima Shahbazyan and Rishabh Garg and Ritika Borkar and Ritu Gala and Riyad Islam and Roger Waleffe and Rohit Watve and Roi Koren and Ruoxi Zhang and Russell J. Hewett and Ryan Prenger and Ryan Timbrook and Sadegh Mahdavi and Sahil Modi and Samuel Kriman and Sanjay Kariyappa and Sanjeev Satheesh and Saori Kaji and Satish Pasumarthi and Sean Narentharen and Sean Narenthiran and Seonmyeong Bak and Sergey Kashirsky and Seth Poulos and Shahar Mor and Shanmugam Ramasamy and Shantanu Acharya and Shaona Ghosh and Sharath Turuvekere Sreenivas and Shelby Thomas and Shiqing Fan and Shreya Gopal and Shrimai Prabhumoye and Shubham Pachori and Shubham Toshniwal and Shuoyang Ding and Siddharth Singh and Simeng Sun and Smita Ithape and Somshubra Majumdar and Soumye Singhal and Stefania Alborghetti and Stephen Ge and Sugam Dipak Devare and Sumeet Kumar Barua and Suseella Panguluri and Suyog Gupta and Sweta Priyadarshi and Syeda Nahida Akter and Tan Bui and Teodor-Dumitru Ene and Terry Kong and Thanh Do and Tijmen Blankevoort and Tom Balough and Tomer Asida and Tomer Bar Natan and Tugrul Konuk and Twinkle Vashishth and Udi Karpas and Ushnish De and Vahid Noorozi and Vahid Noroozi and Venkat Srinivasan and Venmugil Elango and Vijay Korthikanti and Vitaly Kurin and Vitaly Lavrukhin and Wanli Jiang and Wasi Uddin Ahmad and Wei Du and Wei Ping and Wenfei Zhou and Will Jennings and William Zhang and Wojciech Prazuch and Xiaowei Ren and Yashaswi Karnati and Yejin Choi and Yev Meyer and Yi-Fu Wu and Yian Zhang and Ying Lin and Yonatan Geifman and Yonggan Fu and Yoshi Subara and Yoshi Suhara and Yubo Gao and Zach Moshe and Zhen Dong and Zihan Liu and Zijia Chen and Zijie Yan},
journal= {arXiv preprint arXiv:2512.20848},
year = {2025}
}