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Llama 3.1 Nemotron Ultra 253B v1 vs Nemotron Nano 9B v2

Llama 3.1 Nemotron Ultra 253B v1 and Nemotron Nano 9B v2 are closely matched at 19.1 and 18.4 on the LLM Stats Score.

NVIDIA · NVIDIA · Updated for 2026

Which is better?

Llama 3.1 Nemotron Ultra 253B v1 and Nemotron Nano 9B v2 are closely matched on the overall LLM Stats Score at 19.1 and 18.4.

In the 5 individual benchmarks reported for both models, Nemotron Nano 9B v2 wins 3; this is a narrower head-to-head signal than the composite indexes.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Llama 3.1 Nemotron Ultra 253B v1

  • you are already invested in the NVIDIA ecosystem

Choose Nemotron Nano 9B v2

  • you value its reported benchmark strengths — it wins 3 of 5 exact shared results
  • you want the most recent training data — it shipped Aug 2025

At a glance

The differences that matter most.

Llama 3.1 Nemotron Ultra 253B v1
NVIDIA
Nemotron Nano 9B v2
NVIDIA
Core performance indexes
LLM Stats Score
19.1
#206
18.4
#211
Reasoning
18.8
#205
17.2
#210
Coding
12.4
#146
14.4
#133
Cost, coverage & limits
Benchmark wins
2 of 5
3 of 5
Input price
— / M
— / M
Output price
— / M
— / M
Context window
—
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Llama 3.1 Nemotron Ultra 253B v1
Nemotron Nano 9B v2
Math
15.6#214
16.4#205
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

6 reported for Llama 3.1 Nemotron Ultra 253B v1 · 6 for Nemotron Nano 9B v2

5 shared

Llama 3.1 Nemotron Ultra 253B v1 outperforms in 2 benchmarks (AIME 2025, GPQA), while Nemotron Nano 9B v2 is better at 3 benchmarks (IFEval, LiveCodeBench, MATH-500).

Nemotron Nano 9B v2 has a slight edge in benchmark performance.

Mon Sep 21 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Model Size

Parameter count comparison

244.1B diff

Llama 3.1 Nemotron Ultra 253B v1 has 244.1B more parameters than Nemotron Nano 9B v2, making it 2742.7% larger.

NVIDIA
Llama 3.1 Nemotron Ultra 253B v1
253.0Bparameters
NVIDIA
Nemotron Nano 9B v2
8.9Bparameters
253.0B
Llama 3.1 Nemotron Ultra 253B v1
8.9B
Nemotron Nano 9B v2

License

Usage and distribution terms

Llama 3.1 Nemotron Ultra 253B v1 is licensed under Llama 3.1 Community License, while Nemotron Nano 9B v2 uses NVIDIA Open Model License Agreement .

License differences may affect how you can use these models in commercial or open-source projects.

Llama 3.1 Nemotron Ultra 253B v1

Llama 3.1 Community License

Open weights

Nemotron Nano 9B v2

NVIDIA Open Model License Agreement

Open weights

Release Timeline

When each model was launched

Llama 3.1 Nemotron Ultra 253B v1 was released on 2025-04-07, while Nemotron Nano 9B v2 was released on 2025-08-18.

Nemotron Nano 9B v2 is 4 months newer than Llama 3.1 Nemotron Ultra 253B v1.

Llama 3.1 Nemotron Ultra 253B v1

Apr 7, 2025

1.5 years ago

Nemotron Nano 9B v2

Aug 18, 2025

1.1 years ago

4mo newer

Knowledge Cutoff

When training data ends

Llama 3.1 Nemotron Ultra 253B v1 has a knowledge cutoff of 2023-12-01, while Nemotron Nano 9B v2 has a cutoff of 2024-09-01.

Nemotron Nano 9B v2 has more recent training data (up to 2024-09-01), making it potentially better informed about events through that date compared to Llama 3.1 Nemotron Ultra 253B v1 (2023-12-01).

Llama 3.1 Nemotron Ultra 253B v1

Dec 2023

Nemotron Nano 9B v2

Sep 2024

9 mo newer

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Llama 3.1 Nemotron Ultra 253B v1 and Nemotron Nano 9B v2 side-by-side, then vote on the output you prefer.

Llama 3.1 Nemotron Ultra 253B v1
✓ Preferred
Nemotron Nano 9B v2
Open in Playground

FAQ

Common questions about Llama 3.1 Nemotron Ultra 253B v1 vs Nemotron Nano 9B v2.

Which is better, Llama 3.1 Nemotron Ultra 253B v1 or Nemotron Nano 9B v2?

Llama 3.1 Nemotron Ultra 253B v1 and Nemotron Nano 9B v2 are closely matched on the LLM Stats Score at 19.1 and 18.4. Llama 3.1 Nemotron Ultra 253B v1 is made by NVIDIA and Nemotron Nano 9B v2 is made by NVIDIA. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Llama 3.1 Nemotron Ultra 253B v1 compare to Nemotron Nano 9B v2 in benchmarks?

Llama 3.1 Nemotron Ultra 253B v1 scores MATH-500: 97.0%, IFEval: 89.5%, GPQA: 76.0%, BFCL v2: 74.1%, AIME 2025: 72.5%. Nemotron Nano 9B v2 scores MATH-500: 97.8%, IFEval: 90.3%, AIME 2025: 72.1%, LiveCodeBench: 71.1%, BFCL_v3_MultiTurn: 66.9%.

What are the main differences between Llama 3.1 Nemotron Ultra 253B v1 and Nemotron Nano 9B v2?

Key differences include LLM Stats Score (19.1 vs 18.4), licensing (Llama 3.1 Community License vs NVIDIA Open Model License Agreement ). See the full comparison above for benchmark-by-benchmark results.

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