Model Comparison
Grok 4.5 vs Nemotron 3 Super (120B A12B)Which is better in 2026?
Grok 4.5 significantly outperforms across most benchmarks. Nemotron 3 Super (120B A12B) is 15.0x cheaper per token.
Verdict: Grok 4.5 vs Nemotron 3 Super (120B A12B) — which is better?
Grok 4.5 (by xAI) and Nemotron 3 Super (120B A12B) (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.
Grok 4.5 outperforms in 1 benchmarks (GPQA), while Nemotron 3 Super (120B A12B) is better at 0 benchmarks. Grok 4.5 significantly outperforms across most benchmarks.
On price, Nemotron 3 Super (120B A12B) is roughly 15.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Grok 4.5 also accepts a larger context window (500,000 input tokens), making it the stronger choice for long documents and large codebases.
Choose Grok 4.5 if…
- you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
- you process long inputs — it offers a 500,000 token context window
- you want the most recent training data — it shipped Jul 2026
Choose Nemotron 3 Super (120B A12B) if…
- cost matters — it's about 15.0x cheaper per token
- you need open weights you can self-host or fine-tune
Performance Benchmarks
Comparative analysis across standard metrics
Grok 4.5 outperforms in 1 benchmarks (GPQA), while Nemotron 3 Super (120B A12B) is better at 0 benchmarks.
Grok 4.5 significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, Grok 4.5 ($2.00/1M tokens) is 20.0x more expensive than Nemotron 3 Super (120B A12B) ($0.10/1M tokens).
For output processing, Grok 4.5 ($6.00/1M tokens) is 12.0x more expensive than Nemotron 3 Super (120B A12B) ($0.50/1M tokens).
In conclusion, Grok 4.5 is more expensive than Nemotron 3 Super (120B A12B).*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Grok 4.5 accepts 500,000 input tokens compared to Nemotron 3 Super (120B A12B)'s 262,144 tokens. Only Nemotron 3 Super (120B A12B) specifies output context (262,144 tokens).
Input Capabilities
Supported data types and modalities
Grok 4.5 supports multimodal inputs, whereas Nemotron 3 Super (120B A12B) does not.
Grok 4.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.
Grok 4.5
Nemotron 3 Super (120B A12B)
License
Usage and distribution terms
Grok 4.5 is licensed under a proprietary license, while Nemotron 3 Super (120B A12B) 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
Grok 4.5 was released on 2026-07-16, while Nemotron 3 Super (120B A12B) was released on 2026-03-11.
Grok 4.5 is 4 months newer than Nemotron 3 Super (120B A12B).
Jul 16, 2026
5 days ago
4mo newerMar 11, 2026
4 months ago
Knowledge Cutoff
When training data ends
Grok 4.5 has a knowledge cutoff of 2026-02-01, while Nemotron 3 Super (120B A12B) has a cutoff of 2025-06-01.
Grok 4.5 has more recent training data (up to 2026-02-01), making it potentially better informed about events through that date compared to Nemotron 3 Super (120B A12B) (2025-06-01).
Feb 2026
8 mo newerJun 2025
Provider Availability
Grok 4.5 is available from xAI. Nemotron 3 Super (120B A12B) is available from DeepInfra.
Grok 4.5
Nemotron 3 Super (120B A12B)
Outputs Comparison
Key Takeaways
Detailed Comparison
Interactive Arena
Judge for yourself.
Run your own prompts against Grok 4.5 and Nemotron 3 Super (120B A12B) side-by-side, then vote on the output you prefer.
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FAQ
Common questions about Grok 4.5 vs Nemotron 3 Super (120B A12B).