Model Comparison

Gemma 3 4B vs Grok-4 Fast Reasoning

Comparing Gemma 3 4B and Grok-4 Fast Reasoning across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Gemma 3 4B and Grok-4 Fast Reasoning don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemma 3 4B costs less

For input processing, Gemma 3 4B ($0.02/1M tokens) is 10.0x cheaper than Grok-4 Fast Reasoning ($0.20/1M tokens).

For output processing, Gemma 3 4B ($0.04/1M tokens) is 12.5x cheaper than Grok-4 Fast Reasoning ($0.50/1M tokens).

In conclusion, Grok-4 Fast Reasoning is more expensive than Gemma 3 4B.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Thu Apr 16 2026 • llm-stats.com
Google
Gemma 3 4B
Input tokens$0.02
Output tokens$0.04
Best providerDeepinfra
xAI
Grok-4 Fast Reasoning
Input tokens$0.20
Output tokens$0.50
Best providerxAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Grok-4 Fast Reasoning accepts 2,000,000 input tokens compared to Gemma 3 4B's 131,072 tokens. Gemma 3 4B can generate longer responses up to 131,072 tokens, while Grok-4 Fast Reasoning is limited to 30,000 tokens.

Google
Gemma 3 4B
Input131,072 tokens
Output131,072 tokens
xAI
Grok-4 Fast Reasoning
Input2,000,000 tokens
Output30,000 tokens
Thu Apr 16 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemma 3 4B and Grok-4 Fast Reasoning support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Gemma 3 4B

Text
Images
Audio
Video

Grok-4 Fast Reasoning

Text
Images
Audio
Video

License

Usage and distribution terms

Gemma 3 4B is licensed under Gemma, while Grok-4 Fast Reasoning uses a proprietary license.

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

Gemma 3 4B

Gemma

Open weights

Grok-4 Fast Reasoning

Proprietary

Closed source

Release Timeline

When each model was launched

Gemma 3 4B was released on 2025-03-12, while Grok-4 Fast Reasoning was released on 2025-08-28.

Grok-4 Fast Reasoning is 6 months newer than Gemma 3 4B.

Gemma 3 4B

Mar 12, 2025

1.1 years ago

Grok-4 Fast Reasoning

Aug 28, 2025

7 months ago

5mo newer

Knowledge Cutoff

When training data ends

Gemma 3 4B has a documented knowledge cutoff of 2024-08-01, while Grok-4 Fast Reasoning's cutoff date is not specified.

We can confirm Gemma 3 4B's training data extends to 2024-08-01, but cannot make a direct comparison without Grok-4 Fast Reasoning's cutoff date.

Gemma 3 4B

Aug 2024

Grok-4 Fast Reasoning

—

Provider Availability

Gemma 3 4B is available from DeepInfra. Grok-4 Fast Reasoning is available from xAI.

Gemma 3 4B

deepinfra logo
Deepinfra
Input Price:Input: $0.02/1MOutput Price:Output: $0.04/1M

Grok-4 Fast Reasoning

xai logo
xAI
Input Price:Input: $0.20/1MOutput Price:Output: $0.50/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Google
Less expensive input tokens
Less expensive output tokens
Has open weights
xAI
Larger context window (2,000,000 tokens)

Detailed Comparison

AI Model Comparison Table
Feature
Google
Gemma 3 4B
xAI
Grok-4 Fast Reasoning

FAQ

Common questions about Gemma 3 4B vs Grok-4 Fast Reasoning

Gemma 3 4B (Google) and Grok-4 Fast Reasoning (xAI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.
Gemma 3 4B scores IFEval: 90.2%, GSM8k: 89.2%, DocVQA: 75.8%, MATH: 75.6%, AI2D: 74.8%.
Gemma 3 4B is 10.0x cheaper for input tokens. Gemma 3 4B costs $0.02/M input and $0.04/M output via deepinfra. Grok-4 Fast Reasoning costs $0.20/M input and $0.50/M output via xai.
Gemma 3 4B supports 131K tokens and Grok-4 Fast Reasoning supports 2.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include context window (131K vs 2.0M), input pricing ($0.02 vs $0.20/M), licensing (Gemma vs Proprietary). See the full comparison above for benchmark-by-benchmark results.
Gemma 3 4B is developed by Google and Grok-4 Fast Reasoning is developed by xAI.