Model Comparison
GPT-5.1 Medium vs Nemotron 3 Nano (30B A3B)Which is better in 2026?
Nemotron 3 Nano (30B A3B) significantly outperforms across most benchmarks. Nemotron 3 Nano (30B A3B) is 32.7x cheaper per token.
Verdict: GPT-5.1 Medium vs Nemotron 3 Nano (30B A3B) — which is better?
GPT-5.1 Medium (by OpenAI) and Nemotron 3 Nano (30B A3B) (by NVIDIA) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.
GPT-5.1 Medium outperforms in 0 benchmarks, while Nemotron 3 Nano (30B A3B) is better at 1 benchmark (AIME 2025). Nemotron 3 Nano (30B A3B) significantly outperforms across most benchmarks.
On price, Nemotron 3 Nano (30B A3B) is roughly 32.7x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
GPT-5.1 Medium also accepts a larger context window (400,000 input tokens), making it the stronger choice for long documents and large codebases.
Choose GPT-5.1 Medium if…
- you process long inputs — it offers a 400,000 token context window
Choose Nemotron 3 Nano (30B A3B) if…
- you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
- cost matters — it's about 32.7x cheaper per token
- you want the most recent training data — it shipped Dec 2025
- you need open weights you can self-host or fine-tune
Performance Benchmarks
Comparative analysis across standard metrics
GPT-5.1 Medium outperforms in 0 benchmarks, while Nemotron 3 Nano (30B A3B) is better at 1 benchmark (AIME 2025).
Nemotron 3 Nano (30B A3B) significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-5.1 Medium ($1.25/1M tokens) is 20.8x more expensive than Nemotron 3 Nano (30B A3B) ($0.06/1M tokens).
For output processing, GPT-5.1 Medium ($10.00/1M tokens) is 41.7x more expensive than Nemotron 3 Nano (30B A3B) ($0.24/1M tokens).
In conclusion, GPT-5.1 Medium is more expensive than Nemotron 3 Nano (30B A3B).*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-5.1 Medium accepts 400,000 input tokens compared to Nemotron 3 Nano (30B A3B)'s 262,144 tokens. Nemotron 3 Nano (30B A3B) can generate longer responses up to 262,144 tokens, while GPT-5.1 Medium is limited to 128,000 tokens.
Input Capabilities
Supported data types and modalities
GPT-5.1 Medium supports multimodal inputs, whereas Nemotron 3 Nano (30B A3B) does not.
GPT-5.1 Medium can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-5.1 Medium
Nemotron 3 Nano (30B A3B)
License
Usage and distribution terms
GPT-5.1 Medium is licensed under a proprietary license, while Nemotron 3 Nano (30B A3B) uses NVIDIA Open Model License Agreement .
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
NVIDIA Open Model License Agreement
Open weights
Release Timeline
When each model was launched
GPT-5.1 Medium was released on 2025-11-12, while Nemotron 3 Nano (30B A3B) was released on 2025-12-15.
Nemotron 3 Nano (30B A3B) is 1 month newer than GPT-5.1 Medium.
Nov 12, 2025
8 months ago
Dec 15, 2025
7 months ago
1mo newerKnowledge Cutoff
When training data ends
Nemotron 3 Nano (30B A3B) has a documented knowledge cutoff of 2025-11-28, while GPT-5.1 Medium's cutoff date is not specified.
We can confirm Nemotron 3 Nano (30B A3B)'s training data extends to 2025-11-28, but cannot make a direct comparison without GPT-5.1 Medium's cutoff date.
—
Nov 2025
Provider Availability
GPT-5.1 Medium is available from OpenAI. Nemotron 3 Nano (30B A3B) is available from DeepInfra.
GPT-5.1 Medium
Nemotron 3 Nano (30B A3B)
Outputs Comparison
Key Takeaways
Detailed Comparison
Interactive Arena
Judge for yourself.
Run your own prompts against GPT-5.1 Medium and Nemotron 3 Nano (30B A3B) side-by-side, then vote on the output you prefer.
| Feature | | |
|---|
FAQ
Common questions about GPT-5.1 Medium vs Nemotron 3 Nano (30B A3B).