What is the difference between Claude Sonnet 5 and OpenAI o4-mini?

Claude Sonnet 5 is developed by Anthropic while OpenAI o4-mini is developed by OpenAI. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude Sonnet 5 or OpenAI o4-mini?

It depends on your use case. Claude Sonnet 5 and OpenAI o4-mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does Claude Sonnet 5 cost compared to OpenAI o4-mini?

Claude Sonnet 5 costs $2/M input tokens and OpenAI o4-mini costs $1.1/M input tokens. OpenAI o4-mini is $0.90/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 Claude Sonnet 5 and OpenAI o4-mini on Rival?

This page shows a side-by-side comparison of Claude Sonnet 5 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 Claude Sonnet 5 and OpenAI o4-mini?

Claude Sonnet 5 is developed by Anthropic while OpenAI o4-mini is developed by OpenAI. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude Sonnet 5 or OpenAI o4-mini?

It depends on your use case. Claude Sonnet 5 and OpenAI o4-mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does Claude Sonnet 5 cost compared to OpenAI o4-mini?

Claude Sonnet 5 costs $2/M input tokens and OpenAI o4-mini costs $1.1/M input tokens. OpenAI o4-mini is $0.90/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 Claude Sonnet 5 and OpenAI o4-mini on Rival?

This page shows a side-by-side comparison of Claude Sonnet 5 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.

Claude Sonnet 5 vs OpenAI o4-mini: Which Is Better?

Updated Jun 2026

Our Verdict

Claude Sonnet 5

OpenAI o4-miniRunner-up

No community votes yet. On paper, Claude Sonnet 5 has the edge — bigger model tier, newer, bigger context window.

Too close to call

API pricing

Cost per 1M tokens

Claude Sonnet 5

Input

$2.00

Output

$10.00

OpenAI o4-mini

Input

$1.10

1.8× cheaper

Output

$4.40

2.3× cheaper

OpenAI o4-mini is cheaper on both — 1.8× input, 2.3× output

Writing DNA

Style Comparison

Similarity

48%

Claude Sonnet 5 uses 350.5x more bold

Claude Sonnet 5

OpenAI o4-mini

59%Vocabulary73%

35wSentence Length15w

0.53Hedging0.18

3.5Bold0.0

3.5Lists2.1

0.79Emoji0.00

1.25Headings0.00

0.06Transitions0.02

Based on 27 + 10 text responses

Research

What we learned reading every model

Claude Sonnet 5 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

OpenAI o4-mini vs MiniMax M3New provider

OpenAI o4-mini vs Claude Sonnet 4Cross-provider

OpenAI o4-mini vs Pony AlphaNew provider

Updated Jun 2026

Our Verdict

Claude Sonnet 5

OpenAI o4-miniRunner-up

No community votes yet. On paper, Claude Sonnet 5 has the edge — bigger model tier, newer, bigger context window.

Too close to call

API pricing

Cost per 1M tokens

Claude Sonnet 5

Input

$2.00

Output

$10.00

OpenAI o4-mini

Input

$1.10

1.8× cheaper

Output

$4.40

2.3× cheaper

OpenAI o4-mini is cheaper on both — 1.8× input, 2.3× output

Writing DNA

Style Comparison

Similarity

48%

Claude Sonnet 5 uses 350.5x more bold

Claude Sonnet 5

OpenAI o4-mini

59%Vocabulary73%

35wSentence Length15w

0.53Hedging0.18

3.5Bold0.0

3.5Lists2.1

0.79Emoji0.00

1.25Headings0.00

0.06Transitions0.02

Based on 27 + 10 text responses

Research

What we learned reading every model

Claude Sonnet 5 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

OpenAI o4-mini vs MiniMax M3New provider

OpenAI o4-mini vs Claude Sonnet 4Cross-provider

OpenAI o4-mini vs Pony AlphaNew provider