Model Comparison

Grok-1.5V vs Llama 3.1 Nemotron Ultra 253B v1Which is better in 2026?

Comparing Grok-1.5V and Llama 3.1 Nemotron Ultra 253B v1 across benchmarks, pricing, and capabilities.

Verdict: Grok-1.5V vs Llama 3.1 Nemotron Ultra 253B v1 — which is better?

Grok-1.5V (by xAI) and Llama 3.1 Nemotron Ultra 253B v1 (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.

Choose Grok-1.5V if…

  • you are already invested in the xAI ecosystem

Choose Llama 3.1 Nemotron Ultra 253B v1 if…

  • you want the most recent training data — it shipped Apr 2025
  • you need open weights you can self-host or fine-tune

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Grok-1.5V and Llama 3.1 Nemotron Ultra 253B v1don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Input Capabilities

Supported data types and modalities

Grok-1.5V supports multimodal inputs, whereas Llama 3.1 Nemotron Ultra 253B v1 does not.

Grok-1.5V can handle both text and other forms of data like images, making it suitable for multimodal applications.

Grok-1.5V

Text
Images
Audio
Video

Llama 3.1 Nemotron Ultra 253B v1

Text
Images
Audio
Video

License

Usage and distribution terms

Grok-1.5V is licensed under a proprietary license, while Llama 3.1 Nemotron Ultra 253B v1 uses Llama 3.1 Community License.

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

Grok-1.5V

Proprietary

Closed source

Llama 3.1 Nemotron Ultra 253B v1

Llama 3.1 Community License

Open weights

Release Timeline

When each model was launched

Grok-1.5V was released on 2024-04-12, while Llama 3.1 Nemotron Ultra 253B v1 was released on 2025-04-07.

Llama 3.1 Nemotron Ultra 253B v1 is 12 months newer than Grok-1.5V.

Grok-1.5V

Apr 12, 2024

2.3 years ago

Llama 3.1 Nemotron Ultra 253B v1

Apr 7, 2025

1.3 years ago

12mo newer

Knowledge Cutoff

When training data ends

Llama 3.1 Nemotron Ultra 253B v1 has a documented knowledge cutoff of 2023-12-01, while Grok-1.5V's cutoff date is not specified.

We can confirm Llama 3.1 Nemotron Ultra 253B v1's training data extends to 2023-12-01, but cannot make a direct comparison without Grok-1.5V's cutoff date.

Grok-1.5V

—

Llama 3.1 Nemotron Ultra 253B v1

Dec 2023

Outputs Comparison

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Key Takeaways

xAI
Supports multimodal inputs
NVIDIA
Has open weights

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Grok-1.5V and Llama 3.1 Nemotron Ultra 253B v1 side-by-side, then vote on the output you prefer.

Grok-1.5V
✓ Preferred
Llama 3.1 Nemotron Ultra 253B v1
Open in Playground
AI Model Comparison Table
Feature
xAI
Grok-1.5V
NVIDIA
Llama 3.1 Nemotron Ultra 253B v1

FAQ

Common questions about Grok-1.5V vs Llama 3.1 Nemotron Ultra 253B v1.

Which is better, Grok-1.5V or Llama 3.1 Nemotron Ultra 253B v1?

Grok-1.5V (xAI) and Llama 3.1 Nemotron Ultra 253B v1 (NVIDIA) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does Grok-1.5V compare to Llama 3.1 Nemotron Ultra 253B v1 in benchmarks?

Grok-1.5V scores AI2D: 88.3%, DocVQA: 85.6%, TextVQA: 78.1%, ChartQA: 76.1%, RealWorldQA: 68.7%. Llama 3.1 Nemotron Ultra 253B v1 scores MATH-500: 97.0%, IFEval: 89.5%, GPQA: 76.0%, BFCL v2: 74.1%, AIME 2025: 72.5%.

What are the main differences between Grok-1.5V and Llama 3.1 Nemotron Ultra 253B v1?

Key differences include multimodal support (yes vs no), licensing (Proprietary vs Llama 3.1 Community License). See the full comparison above for benchmark-by-benchmark results.

Who makes Grok-1.5V and Llama 3.1 Nemotron Ultra 253B v1?

Grok-1.5V is developed by xAI and Llama 3.1 Nemotron Ultra 253B v1 is developed by NVIDIA.

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