What is the difference between Gemini 2.5 Pro (I/O Edition) and o3 Mini?

Gemini 2.5 Pro (I/O Edition) is developed by Google AI while o3 Mini is developed by OpenAI. You can compare their actual outputs across 41 challenges on Rival to see how they differ in practice.

Which is better, Gemini 2.5 Pro (I/O Edition) or o3 Mini?

It depends on your use case. Gemini 2.5 Pro (I/O Edition) and o3 Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 41 challenges so you can judge which fits your needs best.

How much does Gemini 2.5 Pro (I/O Edition) cost compared to o3 Mini?

Gemini 2.5 Pro (I/O Edition) costs $1.25/M input tokens and o3 Mini costs $1.1/M input tokens. o3 Mini is $0.15/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 Pro (I/O Edition) and o3 Mini on Rival?

This page shows a side-by-side comparison of Gemini 2.5 Pro (I/O Edition) 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 Pro (I/O Edition) and o3 Mini?

Gemini 2.5 Pro (I/O Edition) is developed by Google AI while o3 Mini is developed by OpenAI. You can compare their actual outputs across 41 challenges on Rival to see how they differ in practice.

Which is better, Gemini 2.5 Pro (I/O Edition) or o3 Mini?

It depends on your use case. Gemini 2.5 Pro (I/O Edition) and o3 Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 41 challenges so you can judge which fits your needs best.

How much does Gemini 2.5 Pro (I/O Edition) cost compared to o3 Mini?

Gemini 2.5 Pro (I/O Edition) costs $1.25/M input tokens and o3 Mini costs $1.1/M input tokens. o3 Mini is $0.15/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 Pro (I/O Edition) and o3 Mini on Rival?

This page shows a side-by-side comparison of Gemini 2.5 Pro (I/O Edition) 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 Pro (I/O Edition) vs o3 Mini: Which Is Better?

Updated May 2025

Our Verdict

Gemini 2.5 Pro (I/O Edition)

o3 MiniRunner-up

No community votes yet. On paper, Gemini 2.5 Pro (I/O Edition) has the edge — bigger model tier, newer.

Too close to call

API pricing

Cost per 1M tokens

Gemini 2.5 Pro (I/O Edition)

Input

$1.25

Output

$10.00

o3 Mini

Input

$1.10

1.1× cheaper

Output

$4.40

2.3× cheaper

o3 Mini is cheaper on both — 1.1× input, 2.3× output

Writing DNA

Style Comparison

Similarity

39%

o3 Mini uses 31.8x more transitions

Gemini 2.5 Pro (I/O Edition)

o3 Mini

58%Vocabulary65%

16wSentence Length17w

0.38Hedging0.74

5.8Bold3.9

5.0Lists1.7

0.00Emoji0.00

0.63Headings0.47

0.01Transitions0.38

Based on 16 + 12 text responses

Research

What we learned reading every model

Gemini 2.5 Pro (I/O Edition) 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 May 2025

Our Verdict

Gemini 2.5 Pro (I/O Edition)

o3 MiniRunner-up

No community votes yet. On paper, Gemini 2.5 Pro (I/O Edition) has the edge — bigger model tier, newer.

Too close to call

API pricing

Cost per 1M tokens

Gemini 2.5 Pro (I/O Edition)

Input

$1.25

Output

$10.00

o3 Mini

Input

$1.10

1.1× cheaper

Output

$4.40

2.3× cheaper

o3 Mini is cheaper on both — 1.1× input, 2.3× output

Writing DNA

Style Comparison

Similarity

39%

o3 Mini uses 31.8x more transitions

Gemini 2.5 Pro (I/O Edition)

o3 Mini

58%Vocabulary65%

16wSentence Length17w

0.38Hedging0.74

5.8Bold3.9

5.0Lists1.7

0.00Emoji0.00

0.63Headings0.47

0.01Transitions0.38

Based on 16 + 12 text responses

Research

What we learned reading every model

Gemini 2.5 Pro (I/O Edition) 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