Model Comparison

Gemma 4 12B vs GPT-5.5Which is better in 2026?

GPT-5.5 significantly outperforms across most benchmarks.

Verdict: Gemma 4 12B vs GPT-5.5 — which is better?

Gemma 4 12B (by Google) and GPT-5.5 (by OpenAI) 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 4 12B outperforms in 0 benchmarks, while GPT-5.5 is better at 4 benchmarks (GPQA, Humanity's Last Exam, MMMU-Pro, MRCR v2 (8-needle)). GPT-5.5 significantly outperforms across most benchmarks.

Choose Gemma 4 12B if…

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

Choose GPT-5.5 if…

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

Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

Gemma 4 12B outperforms in 0 benchmarks, while GPT-5.5 is better at 4 benchmarks (GPQA, Humanity's Last Exam, MMMU-Pro, MRCR v2 (8-needle)).

GPT-5.5 significantly outperforms across most benchmarks.

Fri Jul 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only GPT-5.5 specifies input context (1,050,000 tokens). Only GPT-5.5 specifies output context (128,000 tokens).

Google
Gemma 4 12B
Input- tokens
Output- tokens
OpenAI
GPT-5.5
Input1,050,000 tokens
Output128,000 tokens
Fri Jul 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemma 4 12B and GPT-5.5 support multimodal inputs.

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

Gemma 4 12B

Text
Images
Audio
Video

GPT-5.5

Text
Images
Audio
Video

License

Usage and distribution terms

Gemma 4 12B is licensed under Apache 2.0, while GPT-5.5 uses a proprietary license.

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

Gemma 4 12B

Apache 2.0

Open weights

GPT-5.5

Proprietary

Closed source

Release Timeline

When each model was launched

Gemma 4 12B was released on 2026-05-23, while GPT-5.5 was released on 2026-04-23.

Gemma 4 12B is 1 month newer than GPT-5.5.

Gemma 4 12B

May 23, 2026

1 months ago

1mo newer
GPT-5.5

Apr 23, 2026

2 months ago

Knowledge Cutoff

When training data ends

Gemma 4 12B has a knowledge cutoff of 2025-01-01, while GPT-5.5 has a cutoff of 2025-12-01.

GPT-5.5 has more recent training data (up to 2025-12-01), making it potentially better informed about events through that date compared to Gemma 4 12B (2025-01-01).

Gemma 4 12B

Jan 2025

GPT-5.5

Dec 2025

11 mo newer

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Google
Has open weights
OpenAI
Larger context window (1,050,000 tokens)
Higher GPQA score (93.6% vs 78.8%)
Higher Humanity's Last Exam score (52.2% vs 5.2%)
Higher MMMU-Pro score (83.2% vs 69.1%)
Higher MRCR v2 (8-needle) score (74.0% vs 43.4%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Gemma 4 12B and GPT-5.5 side-by-side, then vote on the output you prefer.

Gemma 4 12B
✓ Preferred
GPT-5.5
Open in Playground
AI Model Comparison Table
Feature
Google
Gemma 4 12B
OpenAI
GPT-5.5

FAQ

Common questions about Gemma 4 12B vs GPT-5.5.

Which is better, Gemma 4 12B or GPT-5.5?

GPT-5.5 significantly outperforms across most benchmarks. Gemma 4 12B is made by Google and GPT-5.5 is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Gemma 4 12B compare to GPT-5.5 in benchmarks?

Gemma 4 12B scores FLEURS: 93.1%, MMMLU: 83.4%, MathVision: 79.7%, GPQA: 78.8%, AIME 2026: 77.5%. GPT-5.5 scores Tau2 Telecom: 98.0%, ARC-AGI: 95.0%, GPQA: 93.6%, ARC-AGI v2: 85.0%, GDPval-MM: 84.9%.

What are the context window sizes for Gemma 4 12B and GPT-5.5?

Gemma 4 12B supports an unknown number of tokens and GPT-5.5 supports 1.1M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Gemma 4 12B and GPT-5.5?

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

Who makes Gemma 4 12B and GPT-5.5?

Gemma 4 12B is developed by Google and GPT-5.5 is developed by OpenAI.

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