Model Comparison

Grok 4 Fast vs Qwen2 72B Instruct

Grok 4 Fast significantly outperforms across most benchmarks.

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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Grok 4 Fast outperforms in 1 benchmarks (GPQA), while Qwen2 72B Instruct is better at 0 benchmarks.

Grok 4 Fast significantly outperforms across most benchmarks.

Tue May 12 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only Grok 4 Fast specifies input context (2,000,000 tokens). Only Grok 4 Fast specifies output context (30,000 tokens).

Grok 4 Fast

Input2,000,000 tokens

Output30,000 tokens

Qwen2 72B Instruct

Input- tokens

Output- tokens

Tue May 12 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Grok 4 Fast supports multimodal inputs, whereas Qwen2 72B Instruct does not.

Grok 4 Fast can handle both text and other forms of data like images, making it suitable for multimodal applications.

Grok 4 Fast

Text

Images

Audio

Video

Qwen2 72B Instruct

Text

Images

Audio

Video

License

Usage and distribution terms

Grok 4 Fast is licensed under a proprietary license, while Qwen2 72B Instruct uses tongyi-qianwen.

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

Grok 4 Fast

Proprietary

Closed source

Qwen2 72B Instruct

tongyi-qianwen

Open weights

Release Timeline

When each model was launched

Grok 4 Fast was released on 2025-08-28, while Qwen2 72B Instruct was released on 2024-07-23.

Grok 4 Fast is 13 months newer than Qwen2 72B Instruct.

Grok 4 Fast

Aug 28, 2025

8 months ago

1.1yr newer

Qwen2 72B Instruct

Jul 23, 2024

1.8 years ago

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

Outputs Comparison

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Key Takeaways

Grok 4 Fast

View details

xAI

Larger context window (2,000,000 tokens)

Supports multimodal inputs

Higher GPQA score (85.7% vs 42.4%)

Qwen2 72B Instruct

View details

Alibaba Cloud / Qwen Team

Has open weights

Detailed Comparison

AI Model Comparison Table
Feature	Grok 4 Fast	Qwen2 72B Instruct

FAQ

Common questions about Grok 4 Fast vs Qwen2 72B Instruct.

Which is better, Grok 4 Fast or Qwen2 72B Instruct?

Grok 4 Fast significantly outperforms across most benchmarks. Grok 4 Fast is made by xAI and Qwen2 72B Instruct is made by Alibaba Cloud / Qwen Team. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Grok 4 Fast compare to Qwen2 72B Instruct in benchmarks?

Grok 4 Fast scores SimpleQA: 95.0%, HMMT 2025: 93.3%, AIME 2025: 92.0%, GPQA: 85.7%, LiveCodeBench: 80.0%. Qwen2 72B Instruct scores GSM8k: 91.1%, CMMLU: 90.1%, HellaSwag: 87.6%, HumanEval: 86.0%, Winogrande: 85.1%.

What are the context window sizes for Grok 4 Fast and Qwen2 72B Instruct?

Grok 4 Fast supports 2.0M tokens and Qwen2 72B 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 Fast and Qwen2 72B Instruct?

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

Who makes Grok 4 Fast and Qwen2 72B Instruct?

Grok 4 Fast is developed by xAI and Qwen2 72B Instruct is developed by Alibaba Cloud / Qwen Team.