The AI arena is free today

Open Superagent

Llama 3.1 Nemotron Ultra 253B v1 vs o1-preview

Llama 3.1 Nemotron Ultra 253B v1 and o1-preview are closely matched at 19.1 and 16.6 on the LLM Stats Score.

NVIDIA · OpenAI · Updated for 2026

Which is better?

Llama 3.1 Nemotron Ultra 253B v1 and o1-preview are closely matched on the overall LLM Stats Score at 19.1 and 16.6.

In the 1 individual benchmarks reported for both models, Llama 3.1 Nemotron Ultra 253B v1 wins 1; 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

  • your work emphasizes coding — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 1 of 1 exact shared results
  • you want the most recent training data — it shipped Apr 2025
  • you need open weights you can self-host or fine-tune

Choose o1-preview

  • you want predictable pricing at $15.00/M input and $60.00/M output

At a glance

The differences that matter most.

Llama 3.1 Nemotron Ultra 253B v1
NVIDIA
o1-preview
OpenAI
Core performance indexes
LLM Stats Score
19.1
#206
16.6
#220
Reasoning
18.8
#205
16.8
#213
Coding
12.4
#145
-3.2
#252
Cost, coverage & limits
Benchmark wins
1 of 1
0 of 1
Input price
— / M
$15.00 / M
Output price
— / M
$60.00 / M
Context window
—
128,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Llama 3.1 Nemotron Ultra 253B v1
o1-preview
Math
15.6#214
20.2#161
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

6 reported for Llama 3.1 Nemotron Ultra 253B v1 · 8 for o1-preview

1 shared

Llama 3.1 Nemotron Ultra 253B v1 outperforms in 1 benchmarks (GPQA), while o1-preview is better at 0 benchmarks.

Llama 3.1 Nemotron Ultra 253B v1 significantly outperforms across most benchmarks.

Mon Sep 21 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only o1-preview specifies input context (128,000 tokens). Only o1-preview specifies output context (32,768 tokens).

NVIDIA
Llama 3.1 Nemotron Ultra 253B v1
Input- tokens
Output- tokens
OpenAI
o1-preview
Input128,000 tokens
Output32,768 tokens
Mon Sep 21 2026 • llm-stats.com

License

Usage and distribution terms

Llama 3.1 Nemotron Ultra 253B v1 is licensed under Llama 3.1 Community License, while o1-preview uses a proprietary license.

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

o1-preview

Proprietary

Closed source

Release Timeline

When each model was launched

Llama 3.1 Nemotron Ultra 253B v1 was released on 2025-04-07, while o1-preview was released on 2024-09-12.

Llama 3.1 Nemotron Ultra 253B v1 is 7 months newer than o1-preview.

Llama 3.1 Nemotron Ultra 253B v1

Apr 7, 2025

1.5 years ago

6mo newer
o1-preview

Sep 12, 2024

2.0 years ago

Knowledge Cutoff

When training data ends

Llama 3.1 Nemotron Ultra 253B v1 has a documented knowledge cutoff of 2023-12-01, while o1-preview's cutoff date is not specified.

We can confirm Llama 3.1 Nemotron Ultra 253B v1's training data extends to 2023-12-01, but cannot make a direct comparison without o1-preview's cutoff date.

Llama 3.1 Nemotron Ultra 253B v1

Dec 2023

o1-preview

—

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 o1-preview side-by-side, then vote on the output you prefer.

Llama 3.1 Nemotron Ultra 253B v1
✓ Preferred
o1-preview
Open in Playground

FAQ

Common questions about Llama 3.1 Nemotron Ultra 253B v1 vs o1-preview.

Which is better, Llama 3.1 Nemotron Ultra 253B v1 or o1-preview?

Llama 3.1 Nemotron Ultra 253B v1 and o1-preview are closely matched on the LLM Stats Score at 19.1 and 16.6. Llama 3.1 Nemotron Ultra 253B v1 is made by NVIDIA and o1-preview is made by OpenAI. 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 o1-preview 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%. o1-preview scores MGSM: 90.8%, MMLU: 90.8%, MATH: 85.5%, GPQA: 73.3%, LiveBench: 52.3%.

What are the context window sizes for Llama 3.1 Nemotron Ultra 253B v1 and o1-preview?

Llama 3.1 Nemotron Ultra 253B v1 supports an unknown number of tokens and o1-preview supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Llama 3.1 Nemotron Ultra 253B v1 and o1-preview?

Key differences include LLM Stats Score (19.1 vs 16.6), licensing (Llama 3.1 Community License vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Llama 3.1 Nemotron Ultra 253B v1 and o1-preview?

Llama 3.1 Nemotron Ultra 253B v1 is developed by NVIDIA and o1-preview is developed by OpenAI.

Related comparisons