Model Comparison

Gemini Diffusion vs Grok Code Fast 1

Grok Code Fast 1 significantly outperforms across most benchmarks.

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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Gemini Diffusion outperforms in 0 benchmarks, while Grok Code Fast 1 is better at 1 benchmark (SWE-Bench Verified).

Grok Code Fast 1 significantly outperforms across most benchmarks.

Mon Jun 01 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only Grok Code Fast 1 specifies input context (256,000 tokens). Only Grok Code Fast 1 specifies output context (10,000 tokens).

Google
Gemini Diffusion
Input- tokens
Output- tokens
xAI
Grok Code Fast 1
Input256,000 tokens
Output10,000 tokens
Mon Jun 01 2026 • llm-stats.com

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Gemini Diffusion

Proprietary

Closed source

Grok Code Fast 1

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini Diffusion was released on 2025-05-20, while Grok Code Fast 1 was released on 2025-08-28.

Grok Code Fast 1 is 3 months newer than Gemini Diffusion.

Gemini Diffusion

May 20, 2025

1.0 years ago

Grok Code Fast 1

Aug 28, 2025

9 months ago

3mo 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

Outputs Comparison

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Key Takeaways

Google

No standout differentiators in the data we have for this pair.

xAI
Larger context window (256,000 tokens)
Higher SWE-Bench Verified score (70.8% vs 22.9%)

Detailed Comparison

AI Model Comparison Table
Feature
Google
Gemini Diffusion
xAI
Grok Code Fast 1

FAQ

Common questions about Gemini Diffusion vs Grok Code Fast 1.

Which is better, Gemini Diffusion or Grok Code Fast 1?

Grok Code Fast 1 significantly outperforms across most benchmarks. Gemini Diffusion is made by Google and Grok Code Fast 1 is made by xAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Gemini Diffusion compare to Grok Code Fast 1 in benchmarks?

Gemini Diffusion scores HumanEval: 89.6%, MBPP: 76.0%, Global-MMLU-Lite: 69.1%, LBPP (v2): 56.8%, BigCodeBench: 45.4%. Grok Code Fast 1 scores SWE-Bench Verified: 70.8%.

What are the context window sizes for Gemini Diffusion and Grok Code Fast 1?

Gemini Diffusion supports an unknown number of tokens and Grok Code Fast 1 supports 256K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

Who makes Gemini Diffusion and Grok Code Fast 1?

Gemini Diffusion is developed by Google and Grok Code Fast 1 is developed by xAI.