Llama 3.1 Nemotron Ultra 253B v1 vs o3-mini
Llama 3.1 Nemotron Ultra 253B v1 and o3-mini are closely matched at 19.1 and 21.5 on the LLM Stats Score.
NVIDIA · OpenAI · Updated for 2026
Which is better?
Llama 3.1 Nemotron Ultra 253B v1 and o3-mini are closely matched on the overall LLM Stats Score at 19.1 and 21.5.
In the 2 individual benchmarks reported for both models, o3-mini wins 2; 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 want the most recent training data — it shipped Apr 2025
- you need open weights you can self-host or fine-tune
Choose o3-mini
- you value its reported benchmark strengths — it wins 2 of 2 exact shared results
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
6 reported for Llama 3.1 Nemotron Ultra 253B v1 · 25 for o3-mini
Llama 3.1 Nemotron Ultra 253B v1 outperforms in 0 benchmarks, while o3-mini is better at 2 benchmarks (GPQA, IFEval).
o3-mini significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Context Window
Maximum input and output token capacity
Only o3-mini specifies input context (200,000 tokens). Only o3-mini specifies output context (100,000 tokens).
License
Usage and distribution terms
Llama 3.1 Nemotron Ultra 253B v1 is licensed under Llama 3.1 Community License, while o3-mini uses a proprietary license.
License differences may affect how you can use these models in commercial or open-source projects.
Llama 3.1 Community License
Open weights
Proprietary
Closed source
Release Timeline
When each model was launched
Llama 3.1 Nemotron Ultra 253B v1 was released on 2025-04-07, while o3-mini was released on 2025-01-30.
Llama 3.1 Nemotron Ultra 253B v1 is 2 months newer than o3-mini.
Apr 7, 2025
1.5 years ago
2mo newerJan 30, 2025
1.7 years ago
Knowledge Cutoff
When training data ends
Llama 3.1 Nemotron Ultra 253B v1 has a knowledge cutoff of 2023-12-01, while o3-mini has a cutoff of 2023-09-30.
Llama 3.1 Nemotron Ultra 253B v1 has more recent training data (up to 2023-12-01), making it potentially better informed about events through that date compared to o3-mini (2023-09-30).
Dec 2023
3 mo newerSep 2023
Outputs Comparison
Judge for yourself.
Run your own prompts against Llama 3.1 Nemotron Ultra 253B v1 and o3-mini side-by-side, then vote on the output you prefer.
FAQ
Common questions about Llama 3.1 Nemotron Ultra 253B v1 vs o3-mini.