Model Comparison

Gemma 4 E4B vs GPT-5.5 ProWhich is better in 2026?

Comparing Gemma 4 E4B and GPT-5.5 Pro across benchmarks, pricing, and capabilities.

Verdict: Gemma 4 E4B vs GPT-5.5 Pro — which is better?

Gemma 4 E4B (by Google) and GPT-5.5 Pro (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.

Choose Gemma 4 E4B if…

  • you need open weights you can self-host or fine-tune

Choose GPT-5.5 Pro if…

  • you want the most recent training data — it shipped Apr 2026

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Gemma 4 E4B and GPT-5.5 Prodon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

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

Google
Gemma 4 E4B
Input- tokens
Output- tokens
OpenAI
GPT-5.5 Pro
Input1,050,000 tokens
Output128,000 tokens
Fri Jul 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemma 4 E4B and GPT-5.5 Pro support multimodal inputs.

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

Gemma 4 E4B

Text
Images
Audio
Video

GPT-5.5 Pro

Text
Images
Audio
Video

License

Usage and distribution terms

Gemma 4 E4B is licensed under Apache 2.0, while GPT-5.5 Pro uses a proprietary license.

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

Gemma 4 E4B

Apache 2.0

Open weights

GPT-5.5 Pro

Proprietary

Closed source

Release Timeline

When each model was launched

Gemma 4 E4B was released on 2026-04-02, while GPT-5.5 Pro was released on 2026-04-23.

GPT-5.5 Pro is 1 month newer than Gemma 4 E4B.

Gemma 4 E4B

Apr 2, 2026

3 months ago

GPT-5.5 Pro

Apr 23, 2026

2 months ago

3w newer

Knowledge Cutoff

When training data ends

Gemma 4 E4B has a knowledge cutoff of 2025-01-01, while GPT-5.5 Pro has a cutoff of 2025-12-01.

GPT-5.5 Pro has more recent training data (up to 2025-12-01), making it potentially better informed about events through that date compared to Gemma 4 E4B (2025-01-01).

Gemma 4 E4B

Jan 2025

GPT-5.5 Pro

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)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Gemma 4 E4B and GPT-5.5 Pro side-by-side, then vote on the output you prefer.

Gemma 4 E4B
✓ Preferred
GPT-5.5 Pro
Open in Playground
AI Model Comparison Table
Feature
Google
Gemma 4 E4B
OpenAI
GPT-5.5 Pro

FAQ

Common questions about Gemma 4 E4B vs GPT-5.5 Pro.

Which is better, Gemma 4 E4B or GPT-5.5 Pro?

Gemma 4 E4B (Google) and GPT-5.5 Pro (OpenAI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does Gemma 4 E4B compare to GPT-5.5 Pro in benchmarks?

Gemma 4 E4B scores MMMLU: 76.6%, MMLU-Pro: 69.4%, MathVision: 59.5%, GPQA: 58.6%, t2-bench: 57.5%. GPT-5.5 Pro scores BrowseComp: 90.1%, GDPval-MM: 82.3%, Humanity's Last Exam: 57.2%, FrontierMath: 39.6%, GeneBench: 33.2%.

What are the context window sizes for Gemma 4 E4B and GPT-5.5 Pro?

Gemma 4 E4B supports an unknown number of tokens and GPT-5.5 Pro 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 E4B and GPT-5.5 Pro?

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

Who makes Gemma 4 E4B and GPT-5.5 Pro?

Gemma 4 E4B is developed by Google and GPT-5.5 Pro is developed by OpenAI.

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