What is the difference between Claude 3 Haiku and Claude Opus 4.5?

Both are developed by Anthropic but target different use cases. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude 3 Haiku or Claude Opus 4.5?

It depends on your use case. Claude 3 Haiku and Claude Opus 4.5 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 can I compare Claude 3 Haiku and Claude Opus 4.5 on Rival?

This page shows a side-by-side comparison of Claude 3 Haiku and Claude Opus 4.5 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 3 Haiku and Claude Opus 4.5?

Both are developed by Anthropic but target different use cases. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude 3 Haiku or Claude Opus 4.5?

It depends on your use case. Claude 3 Haiku and Claude Opus 4.5 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 can I compare Claude 3 Haiku and Claude Opus 4.5 on Rival?

This page shows a side-by-side comparison of Claude 3 Haiku and Claude Opus 4.5 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 3 Haiku vs Claude Opus 4.5: Which Is Better?

Updated Nov 2025

Our Verdict

Claude Opus 4.5

Claude 3 HaikuRunner-up

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

Too close to call

API pricing

Cost per 1M tokens

Claude 3 Haiku

Input

$0.25

Output

$1.25

Claude Opus 4.5

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

38%

Claude Opus 4.5 uses 15.2x more emoji

Claude 3 Haiku

Claude Opus 4.5

50%Vocabulary64%

22wSentence Length55w

0.71Hedging0.86

0.3Bold5.8

5.9Lists4.5

0.00Emoji0.15

0.00Headings1.59

0.08Transitions0.05

Based on 13 + 24 text responses

Research

What we learned reading every model

Claude 3 Haiku and Claude Opus 4.5 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

Claude 3 Haiku vs MiniMax M3New provider

Claude 3 Haiku vs Llama 4 MaverickNew provider

Claude 3 Haiku vs GPT-5New provider

Updated Nov 2025

Our Verdict

Claude Opus 4.5

Claude 3 HaikuRunner-up

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

Too close to call

API pricing

Cost per 1M tokens

Claude 3 Haiku

Input

$0.25

Output

$1.25

Claude Opus 4.5

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

38%

Claude Opus 4.5 uses 15.2x more emoji

Claude 3 Haiku

Claude Opus 4.5

50%Vocabulary64%

22wSentence Length55w

0.71Hedging0.86

0.3Bold5.8

5.9Lists4.5

0.00Emoji0.15

0.00Headings1.59

0.08Transitions0.05

Based on 13 + 24 text responses

Research

What we learned reading every model

Claude 3 Haiku and Claude Opus 4.5 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

Claude 3 Haiku vs MiniMax M3New provider

Claude 3 Haiku vs Llama 4 MaverickNew provider

Claude 3 Haiku vs GPT-5New provider