Model Comparison

Claude Opus 4.6 vs Gemma 4 12B UnifiedWhich is better in 2026?

Claude Opus 4.6 significantly outperforms across most benchmarks.

Verdict: Claude Opus 4.6 vs Gemma 4 12B Unified — which is better?

Claude Opus 4.6 (by Anthropic) 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.

Claude Opus 4.6 outperforms in 4 benchmarks (GPQA, Humanity's Last Exam, MMMLU, MMMU-Pro), while Gemma 4 12B Unified is better at 0 benchmarks. Claude Opus 4.6 significantly outperforms across most benchmarks.

Choose Claude Opus 4.6 if…

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

4 benchmarks

Claude Opus 4.6 outperforms in 4 benchmarks (GPQA, Humanity's Last Exam, MMMLU, MMMU-Pro), while Gemma 4 12B Unified is better at 0 benchmarks.

Claude Opus 4.6 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 Claude Opus 4.6 specifies input context (1,000,000 tokens). Only Claude Opus 4.6 specifies output context (128,000 tokens).

Anthropic
Claude Opus 4.6
Input1,000,000 tokens
Output128,000 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 Claude Opus 4.6 and Gemma 4 12B Unified support multimodal inputs.

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

Claude Opus 4.6

Text
Images
Audio
Video

Gemma 4 12B Unified

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Opus 4.6 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.

Claude Opus 4.6

Proprietary

Closed source

Gemma 4 12B Unified

Apache 2.0

Open weights

Release Timeline

When each model was launched

Claude Opus 4.6 was released on 2026-02-05, while Gemma 4 12B Unified was released on 2026-05-23.

Gemma 4 12B Unified is 4 months newer than Claude Opus 4.6.

Claude Opus 4.6

Feb 5, 2026

4 months ago

Gemma 4 12B Unified

May 23, 2026

2 weeks ago

3mo newer

Knowledge Cutoff

When training data ends

Gemma 4 12B Unified has a documented knowledge cutoff of 2025-01-01, while Claude Opus 4.6's cutoff date is not specified.

We can confirm Gemma 4 12B Unified's training data extends to 2025-01-01, but cannot make a direct comparison without Claude Opus 4.6's cutoff date.

Claude Opus 4.6

—

Gemma 4 12B Unified

Jan 2025

Outputs Comparison

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Key Takeaways

Anthropic
Larger context window (1,000,000 tokens)
Higher GPQA score (91.3% vs 78.8%)
Higher Humanity's Last Exam score (53.1% vs 5.2%)
Higher MMMLU score (91.1% vs 83.4%)
Higher MMMU-Pro score (77.3% vs 69.1%)
Google
Has open weights

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude Opus 4.6
Google
Gemma 4 12B Unified

FAQ

Common questions about Claude Opus 4.6 vs Gemma 4 12B Unified.

Which is better, Claude Opus 4.6 or Gemma 4 12B Unified?

Claude Opus 4.6 significantly outperforms across most benchmarks. Claude Opus 4.6 is made by Anthropic 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 Claude Opus 4.6 compare to Gemma 4 12B Unified in benchmarks?

Claude Opus 4.6 scores Vending-Bench 2: 100.0%, AIME 2025: 99.8%, Tau2 Telecom: 99.3%, Graphwalks parents >128k: 95.4%, MRCR v2 (8-needle): 93.0%. 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 Claude Opus 4.6 and Gemma 4 12B Unified?

Claude Opus 4.6 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 Claude Opus 4.6 and Gemma 4 12B Unified?

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

Who makes Claude Opus 4.6 and Gemma 4 12B Unified?

Claude Opus 4.6 is developed by Anthropic and Gemma 4 12B Unified is developed by Google.

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