Nemotron 3 Nano: Complete Guide to Pricing, Context Window, Benchmarks & API

NVIDIA released Nemotron 3 Nano on December 15, 2025. It's a hybrid Mamba-Transformer model with a 1 million token context window and inference speeds up to 4x faster than its predecessor. The architecture is built around efficiency: 31.6 billion total parameters with only 3.6 billion active per token through Mixture-of-Experts (MoE) routing.

The model ships under the NVIDIA Open Model License, which allows commercial use. According to NVIDIA's official announcement, Nemotron 3 Nano is the first in a family of models designed for agentic AI workloads.

Quick Takeaways

• Nemotron 3 Nano uses a hybrid Mamba2-Transformer architecture with MoE routing, activating only 3.6B of 31.6B parameters per token
• The 1 million token context window is validated by RULER benchmark scores of 87.5% at 64K and 70.56% at 512K tokens
• 4x faster inference than Nemotron 2 Nano, optimized for NVIDIA A100 and H100 GPUs
• Outperforms Qwen3 30B-A3B on math (+21.74 points on MATH), code (HumanEval 78.05%), and reasoning benchmarks
• Available through 7+ API providers including Baseten, DeepInfra, Fireworks, Together AI, and Amazon Bedrock
• Open weights under NVIDIA Open Model License allow commercial use, fine-tuning, and redistribution
• Trained on 10.6 trillion tokens with 33% synthetic data for math, code, and tool-calling

Nemotron 3 Nano Key Specifications

View Nemotron 3 Nano details on LLM Stats ->

• Release Date: December 15, 2025
• Total Parameters: 31.6 billion (30B-A3B variant)
• Active Parameters: ~3.6 billion per token
• Architecture: Hybrid Mamba2-Transformer Mixture-of-Experts (MoE)
• Context Window: 1 million tokens
• Training Data: ~10.6 trillion tokens (with ~3.5 trillion synthetic)
• Supported Languages: 20 languages including English, Spanish, French, German, Japanese, Chinese, Korean, Arabic
• License: NVIDIA Open Model License (commercial use permitted)
• Deployment: Hugging Face, vLLM, TensorRT-LLM, SGLang

The Nemotron 3 Nano API is available through Baseten, DeepInfra, Fireworks, FriendliAI, OpenRouter, and Together AI.

Architecture: The Mamba-Transformer Hybrid

The Nemotron 3 Nano technical report describes a hybrid architecture that uses both state-space models and transformers.

*Nemotron 3 Nano's hybrid architecture combines Mamba-2 layers for efficient long-context processing, Transformer attention layers for precise reasoning, and MoE routing that activates only 3.6B of 31.6B parameters per token. This design enables a 1 million token context window with 4x faster inference than previous generations.*

Why Hybrid?

Traditional transformers scale quadratically with sequence length. Every token attends to every other token, which gets expensive at 1 million tokens. State-space models like Mamba handle long sequences efficiently but can struggle with fine-grained reasoning. Research on hybrid architectures shows that combining both approaches can capture the benefits of each.

The hybrid splits the work:

• Mamba-2 layers handle long-context processing with near-linear scaling
• Transformer attention layers handle precise reasoning where token relationships matter
• MoE routing activates only 3.6B of the 31.6B parameters per token

Inference Speed

The Nemotron 3 Nano latency numbers:

• 4x faster than Nemotron 2 Nano
• 3.3x faster than comparable models in its size class
• Optimized for NVIDIA A100 and H100 GPUs

For agentic workflows, coding assistants, or customer-facing applications, the speed difference is noticeable.

Nemotron 3 Nano Benchmarks: How It Performs

View full benchmark data on Hugging Face ->

Nemotron 3 Nano benchmarks compared to Qwen3 30B-A3B, a similar MoE model:

Observations:

• Math: The MATH benchmark shows a +21.74 point improvement over Qwen3
• Code: Leads on HumanEval (78.05% vs 70.73%) and MBPP (75.49% vs 73.15%)
• Reasoning: Outperforms on MMLU-Pro and AGIEval
• Trade-off: Trails on vanilla MMLU, but leads on the harder MMLU-Pro variant

Long Context Performance (RULER Benchmark)

* Nemotron 3 Nano RULER benchmark scores across context lengths from 64K to 512K tokens. The model maintains 87.5% accuracy at 64K tokens and 70.56% at 512K tokens, while Qwen3 30B-A3B caps out at 128K with only 60.69% accuracy. This validates Nemotron 3 Nano's 1 million token context window claims.*

The Nemotron 3 Nano context window holds up well at length:

Qwen3 doesn't support contexts beyond 128K. Nemotron 3 Nano maintains accuracy at 512K tokens with room to scale to the full 1M window.

Training: 10.6 Trillion Tokens

The Nemotron 3 Nano paper (technical report) covers the training data:

Data Composition:

Synthetic Data

About 33% of the training corpus (3.5 trillion tokens) is synthetic, covering:

• Mathematical reasoning problems
• Code generation and explanation
• Multilingual content
• Tool-calling and agentic instruction following

Training Stages:

1. Pre-training: Next-token prediction on the full 10.6T token corpus
2. Instruction fine-tuning: Code, math, and tool-use scenarios
3. Alignment: Safety and helpfulness optimization

Training used NVIDIA's Megatron-LM framework on H800 GPU clusters.

Nemotron 3 Nano API & Pricing

View current pricing and providers ->

The Nemotron 3 Nano API is available through multiple providers. Pricing varies.

Available Providers:

Self-Hosting:

For running on your own infrastructure:

• vLLM: High-throughput serving with PagedAttention
• TensorRT-LLM: NVIDIA-optimized inference
• SGLang: Efficient multi-turn conversation serving

Nemotron 3 Nano price depends on your deployment. Self-hosting on A100 or H100 GPUs gives the lowest per-token cost at scale. Managed APIs are simpler to set up. For full precision (BF16), approximately 60GB of VRAM is recommended; quantized versions can fit in 20-32GB VRAM.

The NVIDIA Open Model License

The NVIDIA Open Model License is less restrictive than some "open" licenses:

• Commercial use: Permitted without royalties
• Modification: You can fine-tune for your use case
• Distribution: You can redistribute the model and derivatives
• Attribution: Required to maintain license notices

Real-World Applications

Nemotron 3 Nano is designed for agentic AI applications.

Agentic Workflows

The model fits agent use cases because of:

• 1M token context for maintaining state across complex tasks
• Strong tool-calling from specialized fine-tuning
• Low latency for responsive multi-step execution

Code Generation

With HumanEval at 78.05% and strong MBPP scores:

• Code completion and generation
• Code review and explanation
• Debugging
• Repository-wide understanding (using the full context window)

Document Processing

The 1M token context window handles:

• Complete legal contracts without chunking
• Full technical documentation sets
• Financial reports with cross-references
• Multi-document research synthesis

Multilingual

20 languages supported, 74.47% on MMLU Global Lite.

Limitations

• Base model only: The BF16 variant is a base model. Instruction following typically requires fine-tuning or an instruct variant.
• Hardware requirements: 31.6B parameters needs significant GPU memory, even with MoE efficiency.
• New architecture: The Mamba-Transformer hybrid is less tested in production than pure transformers.
• Benchmark variance: Trails on vanilla MMLU while leading on harder variants.

Evaluate on your specific use cases before production deployment.

Conclusion

Nemotron 3 Nano represents a meaningful step forward in efficient open-weight language models. The hybrid Mamba-Transformer architecture addresses the fundamental tension between long-context capability and inference cost. By combining state-space models for sequence efficiency with transformer attention for precise reasoning, NVIDIA has produced a model that handles 1 million tokens while running 4x faster than its predecessor.

The benchmark results tell a clear story. Nemotron 3 Nano leads on mathematical reasoning (82.88% on MATH vs 61.14% for Qwen3), code generation (78.05% HumanEval), and long-context tasks (87.5% on RULER at 64K tokens). The trade-offs are real but manageable: slightly lower vanilla MMLU scores and the need for ~60GB VRAM at full precision.

For developers building agentic applications, the combination of open weights, commercial licensing, and strong tool-calling performance makes Nemotron 3 Nano worth evaluating. The model is available today through Hugging Face, Amazon Bedrock, and multiple inference providers.

If you're working on long-context applications, code assistants, or multi-step AI agents, test Nemotron 3 Nano against your workloads. The NVIDIA Nemotron 3 research page provides additional technical details and deployment guides.