What is the difference between Gemini 3 Flash Preview and OpenAI o4-mini?

Gemini 3 Flash Preview is developed by Google AI while OpenAI o4-mini is developed by OpenAI. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Gemini 3 Flash Preview or OpenAI o4-mini?

It depends on your use case. Gemini 3 Flash Preview and OpenAI o4-mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 54 challenges so you can judge which fits your needs best.

How much does Gemini 3 Flash Preview cost compared to OpenAI o4-mini?

Gemini 3 Flash Preview costs $0.5/M input tokens and OpenAI o4-mini costs $1.1/M input tokens. Gemini 3 Flash Preview is $0.60/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare Gemini 3 Flash Preview and OpenAI o4-mini on Rival?

This page shows a side-by-side comparison of Gemini 3 Flash Preview and OpenAI o4-mini 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 Flash Preview and OpenAI o4-mini?

Gemini 3 Flash Preview is developed by Google AI while OpenAI o4-mini is developed by OpenAI. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Gemini 3 Flash Preview or OpenAI o4-mini?

It depends on your use case. Gemini 3 Flash Preview and OpenAI o4-mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 54 challenges so you can judge which fits your needs best.

How much does Gemini 3 Flash Preview cost compared to OpenAI o4-mini?

Gemini 3 Flash Preview costs $0.5/M input tokens and OpenAI o4-mini costs $1.1/M input tokens. Gemini 3 Flash Preview is $0.60/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare Gemini 3 Flash Preview and OpenAI o4-mini on Rival?

This page shows a side-by-side comparison of Gemini 3 Flash Preview and OpenAI o4-mini 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 Flash Preview vs OpenAI o4-mini: Which Is Better?

Updated Dec 2025

Our Verdict

Gemini 3 Flash Preview

OpenAI o4-miniRunner-up

No community votes yet. On paper, Gemini 3 Flash Preview has the edge — bigger model tier, newer, bigger context window.

Too close to call

API pricing

Cost per 1M tokens

Gemini 3 Flash Preview

Input

$0.50

2.2× cheaper

Output

$3.00

1.5× cheaper

OpenAI o4-mini

Input

$1.10

Output

$4.40

Gemini 3 Flash Preview is cheaper on both — 2.2× input, 1.5× output

Writing DNA

Style Comparison

Similarity

50%

Gemini 3 Flash Preview uses 710.1x more bold

Gemini 3 Flash Preview

OpenAI o4-mini

55%Vocabulary73%

18wSentence Length15w

0.42Hedging0.18

7.1Bold0.0

4.5Lists2.1

0.00Emoji0.00

0.84Headings0.00

0.07Transitions0.02

Based on 24 + 10 text responses

Research

What we learned reading every model

Gemini 3 Flash Preview and OpenAI o4-mini 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 o4-mini vs MiniMax M3New provider

OpenAI o4-mini vs Meta: Muse Spark 1.1New provider

OpenAI o4-mini vs Claude Sonnet 4New provider

Updated Dec 2025

Our Verdict

Gemini 3 Flash Preview

OpenAI o4-miniRunner-up

No community votes yet. On paper, Gemini 3 Flash Preview has the edge — bigger model tier, newer, bigger context window.

Too close to call

API pricing

Cost per 1M tokens

Gemini 3 Flash Preview

Input

$0.50

2.2× cheaper

Output

$3.00

1.5× cheaper

OpenAI o4-mini

Input

$1.10

Output

$4.40

Gemini 3 Flash Preview is cheaper on both — 2.2× input, 1.5× output

Writing DNA

Style Comparison

Similarity

50%

Gemini 3 Flash Preview uses 710.1x more bold

Gemini 3 Flash Preview

OpenAI o4-mini

55%Vocabulary73%

18wSentence Length15w

0.42Hedging0.18

7.1Bold0.0

4.5Lists2.1

0.00Emoji0.00

0.84Headings0.00

0.07Transitions0.02

Based on 24 + 10 text responses

Research

What we learned reading every model

Gemini 3 Flash Preview and OpenAI o4-mini 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 o4-mini vs MiniMax M3New provider

OpenAI o4-mini vs Meta: Muse Spark 1.1New provider

OpenAI o4-mini vs Claude Sonnet 4New provider