Model Comparison

Gemini 3 Pro vs Gemma 4 12B UnifiedWhich is better in 2026?

Gemini 3 Pro significantly outperforms across most benchmarks.

Verdict: Gemini 3 Pro vs Gemma 4 12B Unified — which is better?

Gemini 3 Pro (by Google) and Gemma 4 12B Unified (by Google) 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.

Gemini 3 Pro outperforms in 4 benchmarks (GPQA, Humanity's Last Exam, MMMLU, MMMU-Pro), while Gemma 4 12B Unified is better at 1 benchmark (OmniDocBench 1.5). Gemini 3 Pro significantly outperforms across most benchmarks.

Choose Gemini 3 Pro if…

  • you want the strongest raw capability — it leads on 4 of 5 shared benchmarks

Choose Gemma 4 12B Unified if…

  • you want the most recent training data — it shipped May 2026
  • you need open weights you can self-host or fine-tune
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Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

Gemini 3 Pro outperforms in 4 benchmarks (GPQA, Humanity's Last Exam, MMMLU, MMMU-Pro), while Gemma 4 12B Unified is better at 1 benchmark (OmniDocBench 1.5).

Gemini 3 Pro significantly outperforms across most benchmarks.

Tue Jun 09 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only Gemini 3 Pro specifies input context (1,048,576 tokens). Only Gemini 3 Pro specifies output context (65,536 tokens).

Google
Gemini 3 Pro
Input1,048,576 tokens
Output65,536 tokens
Google
Gemma 4 12B Unified
Input- tokens
Output- tokens
Tue Jun 09 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 3 Pro and Gemma 4 12B Unified support multimodal inputs.

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

Gemini 3 Pro

Text
Images
Audio
Video

Gemma 4 12B Unified

Text
Images
Audio
Video

License

Usage and distribution terms

Gemini 3 Pro is licensed under a proprietary license, while Gemma 4 12B Unified uses Apache 2.0.

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

Gemini 3 Pro

Proprietary

Closed source

Gemma 4 12B Unified

Apache 2.0

Open weights

Release Timeline

When each model was launched

Gemini 3 Pro was released on 2025-11-18, while Gemma 4 12B Unified was released on 2026-05-23.

Gemma 4 12B Unified is 6 months newer than Gemini 3 Pro.

Gemini 3 Pro

Nov 18, 2025

6 months ago

Gemma 4 12B Unified

May 23, 2026

2 weeks ago

6mo newer

Knowledge Cutoff

When training data ends

Gemini 3 Pro has a knowledge cutoff of 2025-01-31, while Gemma 4 12B Unified has a cutoff of 2025-01-01.

Gemini 3 Pro has more recent training data (up to 2025-01-31), making it potentially better informed about events through that date compared to Gemma 4 12B Unified (2025-01-01).

Gemini 3 Pro

Jan 2025

Gemma 4 12B Unified

Jan 2025

Outputs Comparison

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Key Takeaways

Google
Larger context window (1,048,576 tokens)
Higher GPQA score (91.9% vs 78.8%)
Higher Humanity's Last Exam score (45.8% vs 5.2%)
Higher MMMLU score (91.8% vs 83.4%)
Higher MMMU-Pro score (81.0% vs 69.1%)
Google
Has open weights
Higher OmniDocBench 1.5 score (16.4% vs 11.5%)

Detailed Comparison

AI Model Comparison Table
Feature
Google
Gemini 3 Pro
Google
Gemma 4 12B Unified

FAQ

Common questions about Gemini 3 Pro vs Gemma 4 12B Unified.

Which is better, Gemini 3 Pro or Gemma 4 12B Unified?

Gemini 3 Pro significantly outperforms across most benchmarks. Gemini 3 Pro is made by Google and Gemma 4 12B Unified is made by Google. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Gemini 3 Pro compare to Gemma 4 12B Unified in benchmarks?

Gemini 3 Pro scores AIME 2025: 100.0%, Vending-Bench 2: 100.0%, Global PIQA: 93.4%, GPQA: 91.9%, MMMLU: 91.8%. Gemma 4 12B Unified scores MMMLU: 83.4%, MathVision: 79.7%, GPQA: 78.8%, AIME 2026: 77.5%, MMLU-Pro: 77.2%.

What are the context window sizes for Gemini 3 Pro and Gemma 4 12B Unified?

Gemini 3 Pro supports 1.0M tokens and Gemma 4 12B Unified 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 Gemini 3 Pro and Gemma 4 12B Unified?

Key differences include licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

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