What is the difference between Gemini 3 Pro Preview and OpenAI o3?

Gemini 3 Pro Preview is developed by Google AI while OpenAI o3 is developed by OpenAI. You can compare their actual outputs across 51 challenges on Rival to see how they differ in practice.

Which is better, Gemini 3 Pro Preview or OpenAI o3?

It depends on your use case. Gemini 3 Pro Preview and OpenAI o3 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 51 challenges so you can judge which fits your needs best.

How can I compare Gemini 3 Pro Preview and OpenAI o3 on Rival?

This page shows a side-by-side comparison of Gemini 3 Pro Preview and OpenAI o3 across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

What is the difference between Gemini 3 Pro Preview and OpenAI o3?

Gemini 3 Pro Preview is developed by Google AI while OpenAI o3 is developed by OpenAI. You can compare their actual outputs across 51 challenges on Rival to see how they differ in practice.

Which is better, Gemini 3 Pro Preview or OpenAI o3?

It depends on your use case. Gemini 3 Pro Preview and OpenAI o3 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 51 challenges so you can judge which fits your needs best.

How can I compare Gemini 3 Pro Preview and OpenAI o3 on Rival?

This page shows a side-by-side comparison of Gemini 3 Pro Preview and OpenAI o3 across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

Gemini 3 Pro Preview vs OpenAI o3: Which Is Better?

Updated Nov 2025

Our Verdict

Gemini 3 Pro Preview

OpenAI o3

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call

API pricing

Cost per 1M tokens

Gemini 3 Pro Preview

Input

—

Output

—

OpenAI o3

Input

$10.00

Output

$40.00

Writing DNA

Style Comparison

Similarity

39%

Gemini 3 Pro Preview uses 11.0x more bold

Gemini 3 Pro Preview

OpenAI o3

58%Vocabulary68%

17wSentence Length14w

0.37Hedging0.26

7.7Bold0.7

4.8Lists3.0

0.00Emoji0.00

0.90Headings0.38

0.25Transitions0.12

Based on 23 + 16 text responses

Research

What we learned reading every model

Gemini 3 Pro Preview and OpenAI o3 have opinions about your brand too.Ask 10 models what they tell people about you. Verbatim receipts.Run the mirror

FAQ

Common questions

Keep exploring

More comparisons

OpenAI o3 vs MiniMax M3New provider

Gemini 3 Pro Preview vs Grok 3New provider

Gemini 3 Pro Preview vs Llama 4 MaverickNew provider

Updated Nov 2025

Our Verdict

Gemini 3 Pro Preview

OpenAI o3

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call

API pricing

Cost per 1M tokens

Gemini 3 Pro Preview

Input

—

Output

—

OpenAI o3

Input

$10.00

Output

$40.00

Writing DNA

Style Comparison

Similarity

39%

Gemini 3 Pro Preview uses 11.0x more bold

Gemini 3 Pro Preview

OpenAI o3

58%Vocabulary68%

17wSentence Length14w

0.37Hedging0.26

7.7Bold0.7

4.8Lists3.0

0.00Emoji0.00

0.90Headings0.38

0.25Transitions0.12

Based on 23 + 16 text responses

Research

What we learned reading every model

Gemini 3 Pro Preview and OpenAI o3 have opinions about your brand too.Ask 10 models what they tell people about you. Verbatim receipts.Run the mirror

FAQ

Common questions

Keep exploring

More comparisons

OpenAI o3 vs MiniMax M3New provider

Gemini 3 Pro Preview vs Grok 3New provider

Gemini 3 Pro Preview vs Llama 4 MaverickNew provider