Model Comparison

Grok-1.5 vs Llama 3.1 Nemotron 70B InstructWhich is better in 2026?

Both models are evenly matched across the benchmarks.

Verdict: Grok-1.5 vs Llama 3.1 Nemotron 70B Instruct — which is better?

Grok-1.5 (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.

Grok-1.5 outperforms in 1 benchmarks (MMLU), while Llama 3.1 Nemotron 70B Instruct is better at 1 benchmark (GSM8k). Both models are evenly matched across the benchmarks.

Choose Grok-1.5 if…

  • you are already invested in the xAI ecosystem

Choose Llama 3.1 Nemotron 70B Instruct if…

  • you want the most recent training data — it shipped Oct 2024
  • you need open weights you can self-host or fine-tune

Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

Grok-1.5 outperforms in 1 benchmarks (MMLU), while Llama 3.1 Nemotron 70B Instruct is better at 1 benchmark (GSM8k).

Both models are evenly matched across the benchmarks.

Tue Jul 28 2026 • llm-stats.com

Arena Performance

Human preference votes

License

Usage and distribution terms

Grok-1.5 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-1.5

Proprietary

Closed source

Llama 3.1 Nemotron 70B Instruct

Llama 3.1 Community License

Open weights

Release Timeline

When each model was launched

Grok-1.5 was released on 2024-03-28, while Llama 3.1 Nemotron 70B Instruct was released on 2024-10-01.

Llama 3.1 Nemotron 70B Instruct is 6 months newer than Grok-1.5.

Grok-1.5

Mar 28, 2024

2.3 years ago

Llama 3.1 Nemotron 70B Instruct

Oct 1, 2024

1.8 years ago

6mo newer

Knowledge Cutoff

When training data ends

Llama 3.1 Nemotron 70B Instruct has a documented knowledge cutoff of 2023-12-01, while Grok-1.5's cutoff date is not specified.

We can confirm Llama 3.1 Nemotron 70B Instruct's training data extends to 2023-12-01, but cannot make a direct comparison without Grok-1.5's cutoff date.

Grok-1.5

—

Llama 3.1 Nemotron 70B Instruct

Dec 2023

Outputs Comparison

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Key Takeaways

xAI
Higher MMLU score (81.3% vs 80.2%)
NVIDIA
Has open weights
Higher GSM8k score (91.4% vs 90.0%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Grok-1.5 and Llama 3.1 Nemotron 70B Instruct side-by-side, then vote on the output you prefer.

Grok-1.5
✓ Preferred
Llama 3.1 Nemotron 70B Instruct
Open in Playground
AI Model Comparison Table
Feature
xAI
Grok-1.5
NVIDIA
Llama 3.1 Nemotron 70B Instruct

FAQ

Common questions about Grok-1.5 vs Llama 3.1 Nemotron 70B Instruct.

Which is better, Grok-1.5 or Llama 3.1 Nemotron 70B Instruct?

Both models are evenly matched across the benchmarks. Grok-1.5 is made by xAI and Llama 3.1 Nemotron 70B Instruct is made by NVIDIA. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Grok-1.5 compare to Llama 3.1 Nemotron 70B Instruct in benchmarks?

Grok-1.5 scores GSM8k: 90.0%, DocVQA: 85.6%, MMLU: 81.3%, HumanEval: 74.1%, MMMU: 53.6%. 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 main differences between Grok-1.5 and Llama 3.1 Nemotron 70B Instruct?

Key differences include licensing (Proprietary vs Llama 3.1 Community License). See the full comparison above for benchmark-by-benchmark results.

Who makes Grok-1.5 and Llama 3.1 Nemotron 70B Instruct?

Grok-1.5 is developed by xAI and Llama 3.1 Nemotron 70B Instruct is developed by NVIDIA.

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