What is the difference between Gemini 2.5 Flash Preview and o3 Mini?

Gemini 2.5 Flash Preview is developed by Google AI while o3 Mini is developed by OpenAI. Gemini 2.5 Flash Preview has a 1.0M token context window vs o3 Mini's 64K. You can compare their actual outputs across 27 challenges on Rival to see how they differ in practice.

Which is better, Gemini 2.5 Flash Preview or o3 Mini?

It depends on your use case. Gemini 2.5 Flash Preview and o3 Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 27 challenges so you can judge which fits your needs best.

How much does Gemini 2.5 Flash Preview cost compared to o3 Mini?

Gemini 2.5 Flash Preview costs $0.15/M input tokens and o3 Mini costs $1.1/M input tokens. Gemini 2.5 Flash Preview is $0.95/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 2.5 Flash Preview and o3 Mini on Rival?

This page shows a side-by-side comparison of Gemini 2.5 Flash Preview and o3 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 2.5 Flash Preview and o3 Mini?

Gemini 2.5 Flash Preview is developed by Google AI while o3 Mini is developed by OpenAI. Gemini 2.5 Flash Preview has a 1.0M token context window vs o3 Mini's 64K. You can compare their actual outputs across 27 challenges on Rival to see how they differ in practice.

Which is better, Gemini 2.5 Flash Preview or o3 Mini?

It depends on your use case. Gemini 2.5 Flash Preview and o3 Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 27 challenges so you can judge which fits your needs best.

How much does Gemini 2.5 Flash Preview cost compared to o3 Mini?

Gemini 2.5 Flash Preview costs $0.15/M input tokens and o3 Mini costs $1.1/M input tokens. Gemini 2.5 Flash Preview is $0.95/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 2.5 Flash Preview and o3 Mini on Rival?

This page shows a side-by-side comparison of Gemini 2.5 Flash Preview and o3 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 2.5 Flash Preview vs o3 Mini: Which Is Better?

Updated Apr 2025

Our Verdict

Gemini 2.5 Flash Preview

o3 MiniRunner-up

No community votes yet. On paper, Gemini 2.5 Flash Preview has the edge — bigger model tier, newer, bigger context window.

Gemini 2.5 Flash Preview is 7.3x cheaper per token — worth considering if cost matters.

Slight edge

API pricing

Cost per 1M tokens

Gemini 2.5 Flash Preview

Input

$0.15

7.3× cheaper

Output

$0.60

7.3× cheaper

o3 Mini

Input

$1.10

Output

$4.40

Gemini 2.5 Flash Preview is cheaper on both — 7.3× input, 7.3× output

Writing DNA

Style Comparison

Similarity

60%

o3 Mini uses 5.3x more headings

Gemini 2.5 Flash Preview

o3 Mini

51%Vocabulary65%

15wSentence Length17w

0.70Hedging0.74

4.1Bold3.9

3.3Lists1.7

0.00Emoji0.00

0.09Headings0.47

0.24Transitions0.38

Based on 12 + 12 text responses

Research

What we learned reading every model

Gemini 2.5 Flash Preview and o3 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

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o3 Mini vs Grok 3New provider

o3 Mini vs Llama 4 MaverickNew provider

Updated Apr 2025

Our Verdict

Gemini 2.5 Flash Preview

o3 MiniRunner-up

No community votes yet. On paper, Gemini 2.5 Flash Preview has the edge — bigger model tier, newer, bigger context window.

Gemini 2.5 Flash Preview is 7.3x cheaper per token — worth considering if cost matters.

Slight edge

API pricing

Cost per 1M tokens

Gemini 2.5 Flash Preview

Input

$0.15

7.3× cheaper

Output

$0.60

7.3× cheaper

o3 Mini

Input

$1.10

Output

$4.40

Gemini 2.5 Flash Preview is cheaper on both — 7.3× input, 7.3× output

Writing DNA

Style Comparison

Similarity

60%

o3 Mini uses 5.3x more headings

Gemini 2.5 Flash Preview

o3 Mini

51%Vocabulary65%

15wSentence Length17w

0.70Hedging0.74

4.1Bold3.9

3.3Lists1.7

0.00Emoji0.00

0.09Headings0.47

0.24Transitions0.38

Based on 12 + 12 text responses

Research

What we learned reading every model

Gemini 2.5 Flash Preview and o3 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

o3 Mini vs MiniMax M3New provider

o3 Mini vs Grok 3New provider

o3 Mini vs Llama 4 MaverickNew provider