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

Gemini 2.5 Flash Preview (thinking) is developed by Google AI while o3 Mini is developed by OpenAI. Gemini 2.5 Flash Preview (thinking) has a 1.0M token context window vs o3 Mini's 64K. You can compare their actual outputs across 20 challenges on Rival to see how they differ in practice.

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

It depends on your use case. Gemini 2.5 Flash Preview (thinking) and o3 Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 20 challenges so you can judge which fits your needs best.

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

Gemini 2.5 Flash Preview (thinking) costs $0.175/M input tokens and o3 Mini costs $1.1/M input tokens. Gemini 2.5 Flash Preview (thinking) is $0.93/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 (thinking) and o3 Mini on Rival?

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

Gemini 2.5 Flash Preview (thinking) is developed by Google AI while o3 Mini is developed by OpenAI. Gemini 2.5 Flash Preview (thinking) has a 1.0M token context window vs o3 Mini's 64K. You can compare their actual outputs across 20 challenges on Rival to see how they differ in practice.

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

It depends on your use case. Gemini 2.5 Flash Preview (thinking) and o3 Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 20 challenges so you can judge which fits your needs best.

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

Gemini 2.5 Flash Preview (thinking) costs $0.175/M input tokens and o3 Mini costs $1.1/M input tokens. Gemini 2.5 Flash Preview (thinking) is $0.93/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 (thinking) and o3 Mini on Rival?

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

Updated Apr 2025

Our Verdict

Gemini 2.5 Flash Preview (thinking)

o3 MiniRunner-up

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

Slight edge

API pricing

Cost per 1M tokens

Gemini 2.5 Flash Preview (thinking)

Input

$0.17

6.3× cheaper

Output

$3.50

1.3× cheaper

o3 Mini

Input

$1.10

Output

$4.40

Gemini 2.5 Flash Preview (thinking) is cheaper on both — 6.3× input, 1.3× output

Writing DNA

Style Comparison

Similarity

57%

o3 Mini uses 46.7x more headings

Gemini 2.5 Flash Preview (thinking)

o3 Mini

53%Vocabulary65%

14wSentence Length17w

0.38Hedging0.74

4.4Bold3.9

4.1Lists1.7

0.00Emoji0.00

0.00Headings0.47

0.24Transitions0.38

Based on 7 + 12 text responses

Research

What we learned reading every model

Gemini 2.5 Flash Preview (thinking) 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

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Updated Apr 2025

Our Verdict

Gemini 2.5 Flash Preview (thinking)

o3 MiniRunner-up

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

Slight edge

API pricing

Cost per 1M tokens

Gemini 2.5 Flash Preview (thinking)

Input

$0.17

6.3× cheaper

Output

$3.50

1.3× cheaper

o3 Mini

Input

$1.10

Output

$4.40

Gemini 2.5 Flash Preview (thinking) is cheaper on both — 6.3× input, 1.3× output

Writing DNA

Style Comparison

Similarity

57%

o3 Mini uses 46.7x more headings

Gemini 2.5 Flash Preview (thinking)

o3 Mini

53%Vocabulary65%

14wSentence Length17w

0.38Hedging0.74

4.4Bold3.9

4.1Lists1.7

0.00Emoji0.00

0.00Headings0.47

0.24Transitions0.38

Based on 7 + 12 text responses

Research

What we learned reading every model

Gemini 2.5 Flash Preview (thinking) 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