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Grok 4 Fast vs Nemotron 3.5 Super VL (120B A12B)

Grok 4 Fast and Nemotron 3.5 Super VL (120B A12B) are closely matched at 31.4 and 35.0 on the LLM Stats Score. Grok 4 Fast is 1.5x cheaper per token.

xAI · NVIDIA · Updated for 2026

Which is better?

Grok 4 Fast and Nemotron 3.5 Super VL (120B A12B) are closely matched on the overall LLM Stats Score at 31.4 and 35.0.

In the 3 individual benchmarks reported for both models, Nemotron 3.5 Super VL (120B A12B) wins 3; this is a narrower head-to-head signal than the composite indexes.

On price, Grok 4 Fast is roughly 1.5x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Grok 4 Fast also accepts a larger context window (2,000,000 input tokens), making it the stronger choice for long documents and large codebases.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Grok 4 Fast

  • cost matters — it's about 1.5x cheaper per token
  • you process long inputs — it offers a 2,000,000 token context window

Choose Nemotron 3.5 Super VL (120B A12B)

  • you value its reported benchmark strengths — it wins 3 of 3 exact shared results
  • you want the most recent training data — it shipped Oct 2026
  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Grok 4 Fast
xAI
Nemotron 3.5 Super VL (120B A12B)
NVIDIA
Core performance indexes
LLM Stats Score
31.4
#132
35.0
#108
Reasoning
30.4
#138
36.2
#94
Coding
18.0
#131
21.0
#108
Agents
2.9
#185
16.5
#99
Cost, coverage & limits
Benchmark wins
0 of 3
3 of 3
Input price
$0.20 / M
$0.20 / M
Output price
$0.50 / M
$1.00 / M
Context window
2,000,000
262,144

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Grok 4 Fast
Nemotron 3.5 Super VL (120B A12B)
Math
27.1#105
28.1#101
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

7 reported for Grok 4 Fast · 19 for Nemotron 3.5 Super VL (120B A12B)

3 shared

Grok 4 Fast outperforms in 0 benchmarks, while Nemotron 3.5 Super VL (120B A12B) is better at 3 benchmarks (BrowseComp, GPQA, Humanity's Last Exam).

Nemotron 3.5 Super VL (120B A12B) significantly outperforms across most benchmarks.

Mon Oct 19 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Grok 4 Fast costs less

For input processing, Grok 4 Fast ($0.20/1M tokens) costs the same as Nemotron 3.5 Super VL (120B A12B) ($0.20/1M tokens).

For output processing, Grok 4 Fast ($0.50/1M tokens) is 2.0x cheaper than Nemotron 3.5 Super VL (120B A12B) ($1.00/1M tokens).

In conclusion, Nemotron 3.5 Super VL (120B A12B) is more expensive than Grok 4 Fast.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Mon Oct 19 2026 • llm-stats.com
xAI
Grok 4 Fast
Input tokens$0.20
Output tokens$0.50
Best providerxAI
NVIDIA
Nemotron 3.5 Super VL (120B A12B)
Input tokens$0.20
Output tokens$1.00
Best providerDeepinfra
Notice missing or incorrect data?

Context Window

Maximum input and output token capacity

Grok 4 Fast accepts 2,000,000 input tokens compared to Nemotron 3.5 Super VL (120B A12B)'s 262,144 tokens. Nemotron 3.5 Super VL (120B A12B) can generate longer responses up to 262,144 tokens, while Grok 4 Fast is limited to 30,000 tokens.

xAI
Grok 4 Fast
Input2,000,000 tokens
Output30,000 tokens
NVIDIA
Nemotron 3.5 Super VL (120B A12B)
Input262,144 tokens
Output262,144 tokens
Mon Oct 19 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Grok 4 Fast and Nemotron 3.5 Super VL (120B A12B) support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Grok 4 Fast

Text
Images
Audio
Video

Nemotron 3.5 Super VL (120B A12B)

Text
Images
Audio
Video

License

Usage and distribution terms

Grok 4 Fast is licensed under a proprietary license, while Nemotron 3.5 Super VL (120B A12B) uses OpenMDW License v1.1.

License differences may affect how you can use these models in commercial or open-source projects.

Grok 4 Fast

Proprietary

Closed source

Nemotron 3.5 Super VL (120B A12B)

OpenMDW License v1.1

Open weights

Release Timeline

When each model was launched

Grok 4 Fast was released on 2025-08-28, while Nemotron 3.5 Super VL (120B A12B) was released on 2026-10-15.

Nemotron 3.5 Super VL (120B A12B) is 14 months newer than Grok 4 Fast.

Grok 4 Fast

Aug 28, 2025

1.1 years ago

Nemotron 3.5 Super VL (120B A12B)

Oct 15, 2026

4 days ago

1.1yr newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

Grok 4 Fast is available from xAI. Nemotron 3.5 Super VL (120B A12B) is available from DeepInfra.

Grok 4 Fast

xai logo
xAI
Input Price:Input: $0.20/1MOutput Price:Output: $0.50/1M

Nemotron 3.5 Super VL (120B A12B)

deepinfra logo
Deepinfra
Input Price:Input: $0.20/1MOutput Price:Output: $1.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Grok 4 Fast and Nemotron 3.5 Super VL (120B A12B) side-by-side, then vote on the output you prefer.

Grok 4 Fast
✓ Preferred
Nemotron 3.5 Super VL (120B A12B)
Open in Playground

FAQ

Common questions about Grok 4 Fast vs Nemotron 3.5 Super VL (120B A12B).

Which is better, Grok 4 Fast or Nemotron 3.5 Super VL (120B A12B)?

Grok 4 Fast and Nemotron 3.5 Super VL (120B A12B) are closely matched on the LLM Stats Score at 31.4 and 35.0. Grok 4 Fast is made by xAI and Nemotron 3.5 Super VL (120B A12B) is made by NVIDIA. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Grok 4 Fast compare to Nemotron 3.5 Super VL (120B A12B) in benchmarks?

Grok 4 Fast scores SimpleQA: 95.0%, HMMT 2025: 93.3%, AIME 2025: 92.0%, GPQA: 85.7%, LiveCodeBench: 80.0%. Nemotron 3.5 Super VL (120B A12B) scores GPQA: 89.5%, LiveCodeBench v6: 88.2%, CharXiv-R: 80.8%, MathVision: 78.2%, BrowseComp: 78.0%.

Is Grok 4 Fast cheaper than Nemotron 3.5 Super VL (120B A12B)?

Both models cost $0.20 per million input tokens.

What are the context window sizes for Grok 4 Fast and Nemotron 3.5 Super VL (120B A12B)?

Grok 4 Fast supports 2.0M tokens and Nemotron 3.5 Super VL (120B A12B) supports 262K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Grok 4 Fast and Nemotron 3.5 Super VL (120B A12B)?

Key differences include LLM Stats Score (31.4 vs 35.0), context window (2.0M vs 262K), licensing (Proprietary vs OpenMDW License v1.1). See the full comparison above for benchmark-by-benchmark results.

Who makes Grok 4 Fast and Nemotron 3.5 Super VL (120B A12B)?

Grok 4 Fast is developed by xAI and Nemotron 3.5 Super VL (120B A12B) is developed by NVIDIA.

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