Model Comparison

Gemma 3 4B vs Grok 4 FastWhich is better in 2026?

Grok 4 Fast significantly outperforms across most benchmarks. Gemma 3 4B is 11.0x cheaper per token.

Verdict: Gemma 3 4B vs Grok 4 Fast — which is better?

Gemma 3 4B (by Google) and Grok 4 Fast (by xAI) 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.

Gemma 3 4B outperforms in 0 benchmarks, while Grok 4 Fast is better at 3 benchmarks (GPQA, LiveCodeBench, SimpleQA). Grok 4 Fast significantly outperforms across most benchmarks.

On price, Gemma 3 4B is roughly 11.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Grok 4 Fast also accepts a larger context window (2,000,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose Gemma 3 4B if…

  • cost matters — it's about 11.0x cheaper per token
  • you need open weights you can self-host or fine-tune

Choose Grok 4 Fast if…

  • you want the strongest raw capability — it leads on 3 of 3 shared benchmarks
  • you process long inputs — it offers a 2,000,000 token context window
  • you want the most recent training data — it shipped Aug 2025
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Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

Gemma 3 4B outperforms in 0 benchmarks, while Grok 4 Fast is better at 3 benchmarks (GPQA, LiveCodeBench, SimpleQA).

Grok 4 Fast significantly outperforms across most benchmarks.

Wed Jun 24 2026 • llm-stats.com

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 ($0.20/1M tokens).

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

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

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

Lowest available price from all providers
Wed Jun 24 2026 • llm-stats.com
Google
Gemma 3 4B
Input tokens$0.02
Output tokens$0.04
Best providerDeepinfra
xAI
Grok 4 Fast
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 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 is limited to 30,000 tokens.

Google
Gemma 3 4B
Input131,072 tokens
Output131,072 tokens
xAI
Grok 4 Fast
Input2,000,000 tokens
Output30,000 tokens
Wed Jun 24 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemma 3 4B and Grok 4 Fast 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

Text
Images
Audio
Video

License

Usage and distribution terms

Gemma 3 4B is licensed under Gemma, while Grok 4 Fast 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

Proprietary

Closed source

Release Timeline

When each model was launched

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

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

Gemma 3 4B

Mar 12, 2025

1.3 years ago

Grok 4 Fast

Aug 28, 2025

10 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'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's cutoff date.

Gemma 3 4B

Aug 2024

Grok 4 Fast

—

Provider Availability

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

Gemma 3 4B

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

Grok 4 Fast

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)
Higher GPQA score (85.7% vs 30.8%)
Higher LiveCodeBench score (80.0% vs 12.6%)
Higher SimpleQA score (95.0% vs 4.0%)

Detailed Comparison

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

FAQ

Common questions about Gemma 3 4B vs Grok 4 Fast.

Which is better, Gemma 3 4B or Grok 4 Fast?

Grok 4 Fast significantly outperforms across most benchmarks. Gemma 3 4B is made by Google and Grok 4 Fast is made by xAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Gemma 3 4B compare to Grok 4 Fast in benchmarks?

Gemma 3 4B scores IFEval: 90.2%, GSM8k: 89.2%, DocVQA: 75.8%, MATH: 75.6%, AI2D: 74.8%. Grok 4 Fast scores SimpleQA: 95.0%, HMMT 2025: 93.3%, AIME 2025: 92.0%, GPQA: 85.7%, LiveCodeBench: 80.0%.

Is Gemma 3 4B cheaper than Grok 4 Fast?

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 costs $0.20/M input and $0.50/M output via xai.

What are the context window sizes for Gemma 3 4B and Grok 4 Fast?

Gemma 3 4B supports 131K tokens and Grok 4 Fast supports 2.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Gemma 3 4B and Grok 4 Fast?

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.

Who makes Gemma 3 4B and Grok 4 Fast?

Gemma 3 4B is developed by Google and Grok 4 Fast is developed by xAI.

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