Model Comparison
Grok 4.5 vs Nemotron 3 Nano (30B A3B)Which is better in 2026?
Grok 4.5 significantly outperforms across most benchmarks. Nemotron 3 Nano (30B A3B) is 28.6x cheaper per token.
Verdict: Grok 4.5 vs Nemotron 3 Nano (30B A3B) — which is better?
Grok 4.5 (by xAI) 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.
Grok 4.5 outperforms in 1 benchmarks (GPQA), while Nemotron 3 Nano (30B A3B) is better at 0 benchmarks. Grok 4.5 significantly outperforms across most benchmarks.
On price, Nemotron 3 Nano (30B A3B) is roughly 28.6x 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 Nano (30B A3B) if…
- cost matters — it's about 28.6x 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 Nano (30B A3B) 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 33.3x more expensive than Nemotron 3 Nano (30B A3B) ($0.06/1M tokens).
For output processing, Grok 4.5 ($6.00/1M tokens) is 25.0x more expensive than Nemotron 3 Nano (30B A3B) ($0.24/1M tokens).
In conclusion, Grok 4.5 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
Grok 4.5 accepts 500,000 input tokens compared to Nemotron 3 Nano (30B A3B)'s 262,144 tokens. Only Nemotron 3 Nano (30B A3B) specifies output context (262,144 tokens).
Input Capabilities
Supported data types and modalities
Grok 4.5 supports multimodal inputs, whereas Nemotron 3 Nano (30B A3B) 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 Nano (30B A3B)
License
Usage and distribution terms
Grok 4.5 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
Grok 4.5 was released on 2026-07-16, while Nemotron 3 Nano (30B A3B) was released on 2025-12-15.
Grok 4.5 is 7 months newer than Nemotron 3 Nano (30B A3B).
Jul 16, 2026
2 weeks ago
7mo newerDec 15, 2025
7 months ago
Knowledge Cutoff
When training data ends
Grok 4.5 has a knowledge cutoff of 2026-02-01, while Nemotron 3 Nano (30B A3B) has a cutoff of 2025-11-28.
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 Nano (30B A3B) (2025-11-28).
Feb 2026
3 mo newerNov 2025
Provider Availability
Grok 4.5 is available from xAI. Nemotron 3 Nano (30B A3B) is available from DeepInfra.
Grok 4.5
Nemotron 3 Nano (30B A3B)
Outputs Comparison
Key Takeaways
Detailed Comparison
Interactive Arena
Judge for yourself.
Run your own prompts against Grok 4.5 and Nemotron 3 Nano (30B A3B) side-by-side, then vote on the output you prefer.
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FAQ
Common questions about Grok 4.5 vs Nemotron 3 Nano (30B A3B).