What is the difference between Claude 3 Haiku and GPT-5.6 Luna Pro?

Claude 3 Haiku is developed by Anthropic while GPT-5.6 Luna Pro is developed by OpenAI. Claude 3 Haiku has a 200K token context window vs GPT-5.6 Luna Pro's 1.1M. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Claude 3 Haiku or GPT-5.6 Luna Pro?

It depends on your use case. Claude 3 Haiku and GPT-5.6 Luna Pro 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 3 Haiku cost compared to GPT-5.6 Luna Pro?

Claude 3 Haiku costs $0.25/M input tokens and GPT-5.6 Luna Pro costs $1/M input tokens. Claude 3 Haiku is $0.75/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 3 Haiku and GPT-5.6 Luna Pro on Rival?

This page shows a side-by-side comparison of Claude 3 Haiku and GPT-5.6 Luna Pro 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 GPT-5.6 Luna Pro?

Claude 3 Haiku is developed by Anthropic while GPT-5.6 Luna Pro is developed by OpenAI. Claude 3 Haiku has a 200K token context window vs GPT-5.6 Luna Pro's 1.1M. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Claude 3 Haiku or GPT-5.6 Luna Pro?

It depends on your use case. Claude 3 Haiku and GPT-5.6 Luna Pro 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 3 Haiku cost compared to GPT-5.6 Luna Pro?

Claude 3 Haiku costs $0.25/M input tokens and GPT-5.6 Luna Pro costs $1/M input tokens. Claude 3 Haiku is $0.75/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 3 Haiku and GPT-5.6 Luna Pro on Rival?

This page shows a side-by-side comparison of Claude 3 Haiku and GPT-5.6 Luna Pro 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 GPT-5.6 Luna Pro: Which Is Better?

Updated Jul 2026

Our Verdict

GPT-5.6 Luna Pro

Claude 3 HaikuRunner-up

No community votes yet. On paper, GPT-5.6 Luna Pro has the edge — newer, bigger context window.

Claude 3 Haiku is 4.8x cheaper per token — worth considering if cost matters.

Too close to call

What do Claude 3 Haiku and GPT-5.6 Luna Pro say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

Claude 3 Haiku

Input

$0.25

4.0× cheaper

Output

$1.25

4.8× cheaper

GPT-5.6 Luna Pro

Input

$1.00

Output

$6.00

Claude 3 Haiku is cheaper on both — 4.0× input, 4.8× output

Writing DNA

Style Comparison

Similarity

69%

GPT-5.6 Luna Pro uses 53.7x more emoji

Claude 3 Haiku

GPT-5.6 Luna Pro

50%Vocabulary58%

22wSentence Length18w

0.71Hedging0.81

0.3Bold2.9

5.9Lists5.1

0.00Emoji0.54

0.00Headings1.10

0.08Transitions0.09

Based on 13 + 27 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Claude 3 Haiku vs Ox AlphaNew provider

Claude 3 Haiku vs MiniMax M3New provider

Claude 3 Haiku vs GPT-5Cross-provider

Updated Jul 2026

Our Verdict

GPT-5.6 Luna Pro

Claude 3 HaikuRunner-up

No community votes yet. On paper, GPT-5.6 Luna Pro has the edge — newer, bigger context window.

Claude 3 Haiku is 4.8x cheaper per token — worth considering if cost matters.

Too close to call

What do Claude 3 Haiku and GPT-5.6 Luna Pro say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

Claude 3 Haiku

Input

$0.25

4.0× cheaper

Output

$1.25

4.8× cheaper

GPT-5.6 Luna Pro

Input

$1.00

Output

$6.00

Claude 3 Haiku is cheaper on both — 4.0× input, 4.8× output

Writing DNA

Style Comparison

Similarity

69%

GPT-5.6 Luna Pro uses 53.7x more emoji

Claude 3 Haiku

GPT-5.6 Luna Pro

50%Vocabulary58%

22wSentence Length18w

0.71Hedging0.81

0.3Bold2.9

5.9Lists5.1

0.00Emoji0.54

0.00Headings1.10

0.08Transitions0.09

Based on 13 + 27 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Claude 3 Haiku vs Ox AlphaNew provider

Claude 3 Haiku vs MiniMax M3New provider

Claude 3 Haiku vs GPT-5Cross-provider