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Gemma 3n E2B vs o3-pro

Comparing Gemma 3n E2B and o3-pro across benchmarks, pricing, and capabilities.

Google · OpenAI · Updated for 2026

Which is better?

Gemma 3n E2B and o3-pro trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Gemma 3n E2B

  • you want the most recent training data — it shipped Jun 2025

Choose o3-pro

  • you want predictable pricing at $20.00/M input and $80.00/M output

At a glance

The differences that matter most.

Gemma 3n E2B
Google
o3-pro
OpenAI
Benchmark wins
—
—
Input price
— / M
$20.00 / M
Output price
— / M
$80.00 / M
Context window
—
200,000

Individual benchmarks

11 reported for Gemma 3n E2B · 0 for o3-pro

No common benchmarks found

Gemma 3n E2B and o3-prodon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only o3-pro specifies input context (200,000 tokens). Only o3-pro specifies output context (100,000 tokens).

Google
Gemma 3n E2B
Input- tokens
Output- tokens
OpenAI
o3-pro
Input200,000 tokens
Output100,000 tokens
Fri Sep 04 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Gemma 3n E2B and o3-pro support multimodal inputs.

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

Gemma 3n E2B

Text
Images
Audio
Video

o3-pro

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Gemma 3n E2B

Proprietary

Closed source

o3-pro

Proprietary

Closed source

Release Timeline

When each model was launched

Gemma 3n E2B was released on 2025-06-26, while o3-pro was released on 2025-06-10.

Gemma 3n E2B is 1 month newer than o3-pro.

Gemma 3n E2B

Jun 26, 2025

1.2 years ago

2w newer
o3-pro

Jun 10, 2025

1.2 years ago

Knowledge Cutoff

When training data ends

Gemma 3n E2B has a knowledge cutoff of 2024-06-01, while o3-pro has a cutoff of 2024-05-31.

Gemma 3n E2B has more recent training data (up to 2024-06-01), making it potentially better informed about events through that date compared to o3-pro (2024-05-31).

Gemma 3n E2B

Jun 2024

1 mo newer
o3-pro

May 2024

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Gemma 3n E2B and o3-pro side-by-side, then vote on the output you prefer.

Gemma 3n E2B
✓ Preferred
o3-pro
Open in Playground

FAQ

Common questions about Gemma 3n E2B vs o3-pro.

Which is better, Gemma 3n E2B or o3-pro?

Gemma 3n E2B (Google) and o3-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 3n E2B compare to o3-pro in benchmarks?

Gemma 3n E2B scores PIQA: 78.9%, BoolQ: 76.4%, ARC-E: 75.8%, HellaSwag: 72.2%, Winogrande: 66.8%.

What are the context window sizes for Gemma 3n E2B and o3-pro?

Gemma 3n E2B supports an unknown number of tokens and o3-pro supports 200K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

Who makes Gemma 3n E2B and o3-pro?

Gemma 3n E2B is developed by Google and o3-pro is developed by OpenAI.

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