Model Comparison

Gemma 3 4B vs Grok 4.5Which is better in 2026?

Grok 4.5 significantly outperforms across most benchmarks. Gemma 3 4B is 120.0x cheaper per token.

Verdict: Gemma 3 4B vs Grok 4.5 — which is better?

Gemma 3 4B (by Google) and Grok 4.5 (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 4.5 is better at 1 benchmark (GPQA). Grok 4.5 significantly outperforms across most benchmarks.

On price, Gemma 3 4B is roughly 120.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Grok 4.5 also accepts a larger context window (500,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose Gemma 3 4B if…

  • cost matters — it's about 120.0x cheaper per token
  • you need open weights you can self-host or fine-tune

Choose Grok 4.5 if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • you process long inputs — it offers a 500,000 token context window
  • you want the most recent training data — it shipped Jul 2026

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Gemma 3 4B outperforms in 0 benchmarks, while Grok 4.5 is better at 1 benchmark (GPQA).

Grok 4.5 significantly outperforms across most benchmarks.

Sat Jul 18 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 100.0x cheaper than Grok 4.5 ($2.00/1M tokens).

For output processing, Gemma 3 4B ($0.04/1M tokens) is 150.0x cheaper than Grok 4.5 ($6.00/1M tokens).

In conclusion, Grok 4.5 is more expensive than Gemma 3 4B.*

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

Lowest available price from all providers
Sat Jul 18 2026 • llm-stats.com
Google
Gemma 3 4B
Input tokens$0.02
Output tokens$0.04
Best providerDeepinfra
xAI
Grok 4.5
Input tokens$2.00
Output tokens$6.00
Best providerxAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Grok 4.5 accepts 500,000 input tokens compared to Gemma 3 4B's 131,072 tokens. Only Gemma 3 4B specifies output context (131,072 tokens).

Google
Gemma 3 4B
Input131,072 tokens
Output131,072 tokens
xAI
Grok 4.5
Input500,000 tokens
Output- tokens
Sat Jul 18 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemma 3 4B and Grok 4.5 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 4.5

Text
Images
Audio
Video

License

Usage and distribution terms

Gemma 3 4B is licensed under Gemma, while Grok 4.5 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 4.5

Proprietary

Closed source

Release Timeline

When each model was launched

Gemma 3 4B was released on 2025-03-12, while Grok 4.5 was released on 2026-07-16.

Grok 4.5 is 16 months newer than Gemma 3 4B.

Gemma 3 4B

Mar 12, 2025

1.4 years ago

Grok 4.5

Jul 16, 2026

2 days ago

1.3yr newer

Knowledge Cutoff

When training data ends

Gemma 3 4B has a knowledge cutoff of 2024-08-01, while Grok 4.5 has a cutoff of 2026-02-01.

Grok 4.5 has more recent training data (up to 2026-02-01), making it potentially better informed about events through that date compared to Gemma 3 4B (2024-08-01).

Gemma 3 4B

Aug 2024

Grok 4.5

Feb 2026

1.5 yr newer

Provider Availability

Gemma 3 4B is available from DeepInfra. Grok 4.5 is available from xAI.

Gemma 3 4B

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

Grok 4.5

xai logo
xAI
Input Price:Input: $2.00/1MOutput Price:Output: $6.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Google
Less expensive input tokens
Less expensive output tokens
Has open weights
xAI
Larger context window (500,000 tokens)
Higher GPQA score (93.0% vs 30.8%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Gemma 3 4B and Grok 4.5 side-by-side, then vote on the output you prefer.

Gemma 3 4B
✓ Preferred
Grok 4.5
Open in Playground
AI Model Comparison Table
Feature
Google
Gemma 3 4B
xAI
Grok 4.5

FAQ

Common questions about Gemma 3 4B vs Grok 4.5.

Which is better, Gemma 3 4B or Grok 4.5?

Grok 4.5 significantly outperforms across most benchmarks. Gemma 3 4B is made by Google and Grok 4.5 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 4.5 in benchmarks?

Gemma 3 4B scores IFEval: 90.2%, GSM8k: 89.2%, DocVQA: 75.8%, MATH: 75.6%, AI2D: 74.8%. Grok 4.5 scores GPQA: 93.0%, Terminal-Bench 2.1: 83.3%, Artificial Analysis Coding Agent Index v1.1: 76.0%, SWE-Bench Pro: 64.7%, AA-Omniscience Index: 63.0%.

Is Gemma 3 4B cheaper than Grok 4.5?

Gemma 3 4B is 100.0x cheaper for input tokens. Gemma 3 4B costs $0.02/M input and $0.04/M output via deepinfra. Grok 4.5 costs $2.00/M input and $6.00/M output via xai.

What are the context window sizes for Gemma 3 4B and Grok 4.5?

Gemma 3 4B supports 131K tokens and Grok 4.5 supports 500K 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 4.5?

Key differences include context window (131K vs 500K), input pricing ($0.02 vs $2.00/M), licensing (Gemma vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemma 3 4B and Grok 4.5?

Gemma 3 4B is developed by Google and Grok 4.5 is developed by xAI.

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