Model Comparison

GPT-4o mini vs Gemma 2 9BWhich is better in 2026?

GPT-4o mini significantly outperforms across most benchmarks.

Verdict: GPT-4o mini vs Gemma 2 9B — which is better?

GPT-4o mini (by OpenAI) and Gemma 2 9B (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.

GPT-4o mini outperforms in 3 benchmarks (HumanEval, MATH, MMLU), while Gemma 2 9B is better at 0 benchmarks. GPT-4o mini significantly outperforms across most benchmarks.

Choose GPT-4o mini if…

  • you want the strongest raw capability — it leads on 3 of 3 shared benchmarks
  • you want the most recent training data — it shipped Jul 2024

Choose Gemma 2 9B if…

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

Comparative analysis across standard metrics

3 benchmarks

GPT-4o mini outperforms in 3 benchmarks (HumanEval, MATH, MMLU), while Gemma 2 9B is better at 0 benchmarks.

GPT-4o mini significantly outperforms across most benchmarks.

Sun Jun 07 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only GPT-4o mini specifies input context (128,000 tokens). Only GPT-4o mini specifies output context (16,384 tokens).

OpenAI
GPT-4o mini
Input128,000 tokens
Output16,384 tokens
Google
Gemma 2 9B
Input- tokens
Output- tokens
Sun Jun 07 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

GPT-4o mini supports multimodal inputs, whereas Gemma 2 9B does not.

GPT-4o mini can handle both text and other forms of data like images, making it suitable for multimodal applications.

GPT-4o mini

Text
Images
Audio
Video

Gemma 2 9B

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-4o mini is licensed under a proprietary license, while Gemma 2 9B uses Gemma.

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

GPT-4o mini

Proprietary

Closed source

Gemma 2 9B

Gemma

Open weights

Release Timeline

When each model was launched

GPT-4o mini was released on 2024-07-18, while Gemma 2 9B was released on 2024-06-27.

GPT-4o mini is 1 month newer than Gemma 2 9B.

GPT-4o mini

Jul 18, 2024

1.9 years ago

3w newer
Gemma 2 9B

Jun 27, 2024

1.9 years ago

Knowledge Cutoff

When training data ends

GPT-4o mini has a documented knowledge cutoff of 2023-10-01, while Gemma 2 9B's cutoff date is not specified.

We can confirm GPT-4o mini's training data extends to 2023-10-01, but cannot make a direct comparison without Gemma 2 9B's cutoff date.

GPT-4o mini

Oct 2023

Gemma 2 9B

—

Outputs Comparison

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Key Takeaways

OpenAI
Larger context window (128,000 tokens)
Supports multimodal inputs
Higher HumanEval score (87.2% vs 40.2%)
Higher MATH score (70.2% vs 36.6%)
Higher MMLU score (82.0% vs 71.3%)
Google
Has open weights

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-4o mini
Google
Gemma 2 9B

FAQ

Common questions about GPT-4o mini vs Gemma 2 9B.

Which is better, GPT-4o mini or Gemma 2 9B?

GPT-4o mini significantly outperforms across most benchmarks. GPT-4o mini is made by OpenAI and Gemma 2 9B is made by Google. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GPT-4o mini compare to Gemma 2 9B in benchmarks?

GPT-4o mini scores HumanEval: 87.2%, MGSM: 87.0%, MMLU: 82.0%, DROP: 79.7%, MATH: 70.2%. Gemma 2 9B scores ARC-E: 88.0%, BoolQ: 84.2%, HellaSwag: 81.9%, PIQA: 81.7%, Winogrande: 80.6%.

What are the context window sizes for GPT-4o mini and Gemma 2 9B?

GPT-4o mini supports 128K tokens and Gemma 2 9B 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 GPT-4o mini and Gemma 2 9B?

Key differences include multimodal support (yes vs no), licensing (Proprietary vs Gemma). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-4o mini and Gemma 2 9B?

GPT-4o mini is developed by OpenAI and Gemma 2 9B is developed by Google.

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