What is the difference between Claude Haiku 4.5 and o3 Mini?

Claude Haiku 4.5 is developed by Anthropic while o3 Mini is developed by OpenAI. Claude Haiku 4.5 has a 200K token context window vs o3 Mini's 64K. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Claude Haiku 4.5 or o3 Mini?

It depends on your use case. Claude Haiku 4.5 and o3 Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 54 challenges so you can judge which fits your needs best.

How much does Claude Haiku 4.5 cost compared to o3 Mini?

Claude Haiku 4.5 costs $1/M input tokens and o3 Mini costs $1.1/M input tokens. Claude Haiku 4.5 is $0.10/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 Haiku 4.5 and o3 Mini on Rival?

This page shows a side-by-side comparison of Claude Haiku 4.5 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 Claude Haiku 4.5 and o3 Mini?

Claude Haiku 4.5 is developed by Anthropic while o3 Mini is developed by OpenAI. Claude Haiku 4.5 has a 200K token context window vs o3 Mini's 64K. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Claude Haiku 4.5 or o3 Mini?

It depends on your use case. Claude Haiku 4.5 and o3 Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 54 challenges so you can judge which fits your needs best.

How much does Claude Haiku 4.5 cost compared to o3 Mini?

Claude Haiku 4.5 costs $1/M input tokens and o3 Mini costs $1.1/M input tokens. Claude Haiku 4.5 is $0.10/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 Haiku 4.5 and o3 Mini on Rival?

This page shows a side-by-side comparison of Claude Haiku 4.5 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.

Claude Haiku 4.5 vs o3 Mini: Which Is Better?

Updated Oct 2025

Our Verdict

Claude Haiku 4.5

o3 MiniRunner-up

No community votes yet. On paper, Claude Haiku 4.5 has the edge — bigger model tier, newer, bigger context window.

Slight edge

API pricing

Cost per 1M tokens

Claude Haiku 4.5

Input

$1.00

1.1× cheaper

Output

$5.00

o3 Mini

Input

$1.10

Output

$4.40

1.1× cheaper

Claude Haiku 4.5 wins input (1.1× cheaper)·o3 Mini wins output (1.1× cheaper)

Writing DNA

Style Comparison

Similarity

36%

Claude Haiku 4.5 uses 20.4x more emoji

Claude Haiku 4.5

o3 Mini

61%Vocabulary65%

47wSentence Length17w

0.64Hedging0.74

5.1Bold3.9

6.3Lists1.7

0.20Emoji0.00

2.46Headings0.47

0.17Transitions0.38

Based on 24 + 12 text responses

Research

What we learned reading every model

Claude Haiku 4.5 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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o3 Mini vs xAI: Grok 4New provider

o3 Mini vs Pony AlphaNew provider

Updated Oct 2025

Our Verdict

Claude Haiku 4.5

o3 MiniRunner-up

No community votes yet. On paper, Claude Haiku 4.5 has the edge — bigger model tier, newer, bigger context window.

Slight edge

API pricing

Cost per 1M tokens

Claude Haiku 4.5

Input

$1.00

1.1× cheaper

Output

$5.00

o3 Mini

Input

$1.10

Output

$4.40

1.1× cheaper

Claude Haiku 4.5 wins input (1.1× cheaper)·o3 Mini wins output (1.1× cheaper)

Writing DNA

Style Comparison

Similarity

36%

Claude Haiku 4.5 uses 20.4x more emoji

Claude Haiku 4.5

o3 Mini

61%Vocabulary65%

47wSentence Length17w

0.64Hedging0.74

5.1Bold3.9

6.3Lists1.7

0.20Emoji0.00

2.46Headings0.47

0.17Transitions0.38

Based on 24 + 12 text responses

Research

What we learned reading every model

Claude Haiku 4.5 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 xAI: Grok 4New provider

o3 Mini vs Pony AlphaNew provider