Model Comparison

Grok 4.5 vs Llama 3.1 Nemotron 70B InstructWhich is better in 2026?

Comparing Grok 4.5 and Llama 3.1 Nemotron 70B Instruct across benchmarks, pricing, and capabilities.

Verdict: Grok 4.5 vs Llama 3.1 Nemotron 70B Instruct — which is better?

Grok 4.5 (by xAI) and Llama 3.1 Nemotron 70B Instruct (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 4.5 if…

  • you want the most recent training data — it shipped Jul 2026

Choose Llama 3.1 Nemotron 70B Instruct if…

  • you need open weights you can self-host or fine-tune

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Grok 4.5 and Llama 3.1 Nemotron 70B Instructdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only Grok 4.5 specifies input context (500,000 tokens).

xAI
Grok 4.5
Input500,000 tokens
Output- tokens
NVIDIA
Llama 3.1 Nemotron 70B Instruct
Input- tokens
Output- tokens
Tue Jul 21 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Grok 4.5 supports multimodal inputs, whereas Llama 3.1 Nemotron 70B Instruct 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

Text
Images
Audio
Video

Llama 3.1 Nemotron 70B Instruct

Text
Images
Audio
Video

License

Usage and distribution terms

Grok 4.5 is licensed under a proprietary license, while Llama 3.1 Nemotron 70B Instruct uses Llama 3.1 Community License.

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

Grok 4.5

Proprietary

Closed source

Llama 3.1 Nemotron 70B Instruct

Llama 3.1 Community License

Open weights

Release Timeline

When each model was launched

Grok 4.5 was released on 2026-07-16, while Llama 3.1 Nemotron 70B Instruct was released on 2024-10-01.

Grok 4.5 is 22 months newer than Llama 3.1 Nemotron 70B Instruct.

Grok 4.5

Jul 16, 2026

5 days ago

1.8yr newer
Llama 3.1 Nemotron 70B Instruct

Oct 1, 2024

1.8 years ago

Knowledge Cutoff

When training data ends

Grok 4.5 has a knowledge cutoff of 2026-02-01, while Llama 3.1 Nemotron 70B Instruct has a cutoff of 2023-12-01.

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 Llama 3.1 Nemotron 70B Instruct (2023-12-01).

Grok 4.5

Feb 2026

2.2 yr newer
Llama 3.1 Nemotron 70B Instruct

Dec 2023

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

xAI
Larger context window (500,000 tokens)
Supports multimodal inputs
NVIDIA
Has open weights

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Grok 4.5 and Llama 3.1 Nemotron 70B Instruct side-by-side, then vote on the output you prefer.

Grok 4.5
✓ Preferred
Llama 3.1 Nemotron 70B Instruct
Open in Playground
AI Model Comparison Table
Feature
xAI
Grok 4.5
NVIDIA
Llama 3.1 Nemotron 70B Instruct

FAQ

Common questions about Grok 4.5 vs Llama 3.1 Nemotron 70B Instruct.

Which is better, Grok 4.5 or Llama 3.1 Nemotron 70B Instruct?

Grok 4.5 (xAI) and Llama 3.1 Nemotron 70B Instruct (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 4.5 compare to Llama 3.1 Nemotron 70B Instruct in benchmarks?

Grok 4.5 scores GPQA: 93.0%, Terminal-Bench 2.1: 83.3%, Artificial Analysis Coding Agent Index v1.1: 76.0%, SWE-Bench Pro: 64.7%, AA-Omniscience Index: 63.0%. Llama 3.1 Nemotron 70B Instruct scores GSM8k: 91.4%, HellaSwag: 85.6%, Winogrande: 84.5%, GSM8K Chat: 81.9%, MMLU Chat: 80.6%.

What are the context window sizes for Grok 4.5 and Llama 3.1 Nemotron 70B Instruct?

Grok 4.5 supports 500K tokens and Llama 3.1 Nemotron 70B Instruct supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Grok 4.5 and Llama 3.1 Nemotron 70B Instruct?

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 4.5 and Llama 3.1 Nemotron 70B Instruct?

Grok 4.5 is developed by xAI and Llama 3.1 Nemotron 70B Instruct is developed by NVIDIA.

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