Nemotron-3-Nano-4B

NVIDIA

Parameters

4.0B

Architecture

Mamba2-Transformer Hybrid (Nemotron-Hybrid)

Released

16.03.2026

License

NVIDIA Nemotron Open Model License

Open Weights Commercial Use Multimodal BF16 Nemotron en

Input Modalities

text

Output Modalities

text

Context (native)

262,144 tokens

Context (extended)

262,144 tokens

Openness Index Score 70.0/100

About

NVIDIA-Nemotron-3-Nano-4B is a small language model (SLM) trained from scratch by NVIDIA and designed as a unified model for both reasoning and non-reasoning tasks: it answers queries by first generating a reasoning trace, then concluding with a final response, with the reasoning behavior controllable via a system prompt. It was compressed from NVIDIA-Nemotron-Nano-9B-v2 using the Nemotron Elastic framework (arXiv 2511.16664).

Its Mamba2-Transformer hybrid (Nemotron-Hybrid) architecture consists primarily of Mamba2 SSM and MLP layers combined with just four Attention layers, giving 3.97B parameters with a 262K-token context window and high inference efficiency on NVIDIA hardware (A10G, A100, H100, GeForce RTX; NeMo 25.07 runtime). Input and output are text, English and coding languages.

Pre-training used more than 10 trillion tokens (data cutoff September 2024). The post-training corpus spans English and multilingual text across code, legal, math, science and finance domains, and includes synthetic reasoning traces distilled from DeepSeek R1/R1-0528, Qwen3-235B-A22B, Nemotron 4 340B and Qwen2.5 models - the model notes it was "Improved using Qwen".

It targets edge-ready Agentic AI on Jetson Thor, GeForce RTX and DGX Spark: AI gaming NPCs (teammates/companions), local voice assistants, and IoT automation. Model dates Dec 2025 - Jan 2026; released on Hugging Face March 16, 2026 under the NVIDIA Nemotron Open Model License; ready for commercial use.

Training Data 10+ trillion tokens pre-training, compressed from NVIDIA-Nemotron-Nano-9B-v2

Benchmark Scores

Benchmark Score Date Standing
BFCL-V4
general_agent
31.99%
—
#23/27
better than 15%
MMLU-Pro
knowledge
18.39%
—
#42/48
better than 13%
SWE-bench Verified
coding_agent
2.98%
—
#58/60
better than 3%
Humanity's Last Exam
stem_reasoning
5.30%
—
#68/71
better than 4%
GPQA Diamond
stem_reasoning
18.70%
—
#73/80
better than 8%
Terminal Bench 2.1
coding_agent
3.77%
—
#40/44
better than 9%
SuperGPQA
knowledge
26.13%
—
#25/28
better than 11%
BrowseComp-zh
general_agent
3.30
—
#13/13
better than 0%
BrowseComp
general_agent
1.80%
—
#43/45
better than 5%
NoLiMa
long_context
0.89%
—
#7/9
better than 25%

Architecture

Decoder Block input Embedding vocab 131K · d 3136 Linear / Recurrent Hybrid 40:8 · dₕ 128 ×42 Dense FFN SwiGLU · d 13K Final RMSNorm LM Head vocab 131K output
Attention
Hybrid Attention (40:8)
Layers
42
Hidden size
3136
Context
262K tokens
Parameters
3970M

Source: Hugging Face config.json · NemotronHForCausalLM · model repo

Type: Mamba2-Transformer hybrid (Nemotron-Hybrid): mostly Mamba2 SSM + MLP layers + 4 attention layers
Attention: Only 4 full-attention layers; remaining positions handled by Mamba2 selective state-space blocks
Decoder: Hybrid SSM-Transformer decoder
Arch Family

Nemotron-Hybrid

Compression

Nemotron Elastic framework (arXiv 2511.16664)

Hardware

A10G, A100, H100-80GB, GeForce RTX, Jetson Thor, DGX Spark

Input

text

Output

text

Parent Model

NVIDIA-Nemotron-Nano-9B-v2

Runtime

NeMo 25.07

Training Pipeline

  1. 1
    pretraining

    Pre-training (>10T tokens)

    Trained from scratch on more than 10 trillion tokens (data cutoff September 2024).

  2. 2
    other

    Elastic compression from Nemotron-Nano-9B-v2

    Compressed from the 9B parent via the Nemotron Elastic framework (arXiv 2511.16664).

  3. 3
    sft

    Post-training SFT with synthetic reasoning traces

    English + multilingual corpus across code, legal, math, science, finance; synthetic reasoning traces distilled from DeepSeek R1/R1-0528, Qwen3-235B-A22B, Nemotron 4 340B, Qwen2.5-32B/14B/72B; improved using Qwen.

Training & Evaluation Datasets

NameRoleSizeModalitiesCollection
AI2's Reasoning Challenge finetune — —
APIGen Function-Calling finetune — —
Bespoke-Stratos-17k finetune — —
Big-Math-RL-Verified finetune — —
Cosmos QA finetune — —
Essential-Web pretraining — —
FineMath pretraining — —
FineWeb-2 pretraining — —
HelpSteer3 finetune — —
LMSYS-Chat-1M finetune — —
MCTest finetune — —
MMLU Auxiliary Train finetune — —
MedMCQA finetune — —
MegaMath pretraining — —
MetaMathQA finetune — —
Moral Stories finetune — —
MultiverseMathHard finetune — —
NuminaMath CoT finetune — —
OpenCodeReasoning-2 finetune — —
OpenWebMath pretraining — —
SWE-Gym finetune — —
Skywork-OR1-RL-Data finetune — —
The Stack pretraining — —
WikiTableQuestions finetune — —
WildChat-1M finetune — —
arithmetic finetune — —
finepdfs pretraining — —
glaive-function-calling-v2 finetune — —
mC4 pretraining — —
opc-sft-stage2 finetune — —
peS2o pretraining — —
simple-arithmetic-problems finetune — —
social-chemestry-101 finetune — —
tigerbot-kaggle-leetcodesolutions-en-2k finetune — —
Private third-party datasets (Global Regulation, Workbench) training — —
Online dataset sources (Common Crawl Foundation) pretraining — —
NVIDIA-sourced synthetic datasets training — —

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