What is the difference between Gemini 2.5 Pro (I/O Edition) and OpenAI o4-mini?

Gemini 2.5 Pro (I/O Edition) is developed by Google AI while OpenAI o4-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 OpenAI o4-mini?

It depends on your use case. Gemini 2.5 Pro (I/O Edition) and OpenAI o4-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 OpenAI o4-mini?

Gemini 2.5 Pro (I/O Edition) costs $1.25/M input tokens and OpenAI o4-mini costs $1.1/M input tokens. OpenAI o4-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 OpenAI o4-mini on Rival?

This page shows a side-by-side comparison of Gemini 2.5 Pro (I/O Edition) 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 2.5 Pro (I/O Edition) and OpenAI o4-mini?

Gemini 2.5 Pro (I/O Edition) is developed by Google AI while OpenAI o4-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 OpenAI o4-mini?

It depends on your use case. Gemini 2.5 Pro (I/O Edition) and OpenAI o4-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 OpenAI o4-mini?

Gemini 2.5 Pro (I/O Edition) costs $1.25/M input tokens and OpenAI o4-mini costs $1.1/M input tokens. OpenAI o4-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 OpenAI o4-mini on Rival?

This page shows a side-by-side comparison of Gemini 2.5 Pro (I/O Edition) 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 2.5 Pro (I/O Edition) vs OpenAI o4-mini: Which Is Better?

Updated May 2025

Our Verdict

Gemini 2.5 Pro (I/O Edition)

OpenAI o4-miniRunner-up

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

Too close to call

API pricing

Cost per 1M tokens

Gemini 2.5 Pro (I/O Edition)

Input

$1.25

Output

$10.00

OpenAI o4-mini

Input

$1.10

1.1× cheaper

Output

$4.40

2.3× cheaper

OpenAI o4-mini is cheaper on both — 1.1× input, 2.3× output

Writing DNA

Style Comparison

Similarity

57%

Gemini 2.5 Pro (I/O Edition) uses 578.2x more bold

Gemini 2.5 Pro (I/O Edition)

OpenAI o4-mini

58%Vocabulary73%

16wSentence Length15w

0.38Hedging0.18

5.8Bold0.0

5.0Lists2.1

0.00Emoji0.00

0.63Headings0.00

0.01Transitions0.02

Based on 16 + 10 text responses

Research

What we learned reading every model

Gemini 2.5 Pro (I/O Edition) 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

Gemini 2.5 Pro (I/O Edition) vs MiniMax M3New provider

Gemini 2.5 Pro (I/O Edition) vs Grok 3New provider

Gemini 2.5 Pro (I/O Edition) vs Llama 4 MaverickNew provider

Updated May 2025

Our Verdict

Gemini 2.5 Pro (I/O Edition)

OpenAI o4-miniRunner-up

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

Too close to call

API pricing

Cost per 1M tokens

Gemini 2.5 Pro (I/O Edition)

Input

$1.25

Output

$10.00

OpenAI o4-mini

Input

$1.10

1.1× cheaper

Output

$4.40

2.3× cheaper

OpenAI o4-mini is cheaper on both — 1.1× input, 2.3× output

Writing DNA

Style Comparison

Similarity

57%

Gemini 2.5 Pro (I/O Edition) uses 578.2x more bold

Gemini 2.5 Pro (I/O Edition)

OpenAI o4-mini

58%Vocabulary73%

16wSentence Length15w

0.38Hedging0.18

5.8Bold0.0

5.0Lists2.1

0.00Emoji0.00

0.63Headings0.00

0.01Transitions0.02

Based on 16 + 10 text responses

Research

What we learned reading every model

Gemini 2.5 Pro (I/O Edition) 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

Gemini 2.5 Pro (I/O Edition) vs MiniMax M3New provider

Gemini 2.5 Pro (I/O Edition) vs Grok 3New provider

Gemini 2.5 Pro (I/O Edition) vs Llama 4 MaverickNew provider