What is the difference between GPT-5 Pro and o3 Mini?

Both are developed by OpenAI but target different use cases. GPT-5 Pro has a 400K token context window vs o3 Mini's 64K. You can compare their actual outputs across 42 challenges on Rival to see how they differ in practice.

Which is better, GPT-5 Pro or o3 Mini?

It depends on your use case. GPT-5 Pro and o3 Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 42 challenges so you can judge which fits your needs best.

How much does GPT-5 Pro cost compared to o3 Mini?

GPT-5 Pro costs $15/M input tokens and o3 Mini costs $1.1/M input tokens. o3 Mini is $13.90/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 GPT-5 Pro and o3 Mini on Rival?

This page shows a side-by-side comparison of GPT-5 Pro 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 GPT-5 Pro and o3 Mini?

Both are developed by OpenAI but target different use cases. GPT-5 Pro has a 400K token context window vs o3 Mini's 64K. You can compare their actual outputs across 42 challenges on Rival to see how they differ in practice.

Which is better, GPT-5 Pro or o3 Mini?

It depends on your use case. GPT-5 Pro and o3 Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 42 challenges so you can judge which fits your needs best.

How much does GPT-5 Pro cost compared to o3 Mini?

GPT-5 Pro costs $15/M input tokens and o3 Mini costs $1.1/M input tokens. o3 Mini is $13.90/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 GPT-5 Pro and o3 Mini on Rival?

This page shows a side-by-side comparison of GPT-5 Pro 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.

GPT-5 Pro vs o3 Mini: Which Is Better?

Updated Oct 2025

Our Verdict

GPT-5 Pro

o3 MiniRunner-up

No community votes yet. On paper, GPT-5 Pro has the edge — bigger model tier, newer, bigger context window.

o3 Mini is 27x cheaper per token — worth considering if cost matters.

Slight edge

API pricing

Cost per 1M tokens

GPT-5 Pro

Input

$15.00

Output

$120.00

o3 Mini

Input

$1.10

14× cheaper

Output

$4.40

27× cheaper

o3 Mini is cheaper on both — 14× input, 27× output

Writing DNA

Style Comparison

Similarity

63%

o3 Mini uses 390.2x more bold

GPT-5 Pro

o3 Mini

65%Vocabulary65%

15wSentence Length17w

0.32Hedging0.74

0.0Bold3.9

2.9Lists1.7

0.00Emoji0.00

0.00Headings0.47

0.01Transitions0.38

Based on 11 + 12 text responses

Research

What we learned reading every model

GPT-5 Pro 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

Updated Oct 2025

Our Verdict

GPT-5 Pro

o3 MiniRunner-up

No community votes yet. On paper, GPT-5 Pro has the edge — bigger model tier, newer, bigger context window.

o3 Mini is 27x cheaper per token — worth considering if cost matters.

Slight edge

API pricing

Cost per 1M tokens

GPT-5 Pro

Input

$15.00

Output

$120.00

o3 Mini

Input

$1.10

14× cheaper

Output

$4.40

27× cheaper

o3 Mini is cheaper on both — 14× input, 27× output

Writing DNA

Style Comparison

Similarity

63%

o3 Mini uses 390.2x more bold

GPT-5 Pro

o3 Mini

65%Vocabulary65%

15wSentence Length17w

0.32Hedging0.74

0.0Bold3.9

2.9Lists1.7

0.00Emoji0.00

0.00Headings0.47

0.01Transitions0.38

Based on 11 + 12 text responses

Research

What we learned reading every model

GPT-5 Pro 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