What is the difference between Claude Haiku 4.5 and OpenAI: GPT-5.6 Terra?

Claude Haiku 4.5 is developed by Anthropic while OpenAI: GPT-5.6 Terra is developed by OpenAI. Claude Haiku 4.5 has a 200K token context window vs OpenAI: GPT-5.6 Terra's 1.1M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude Haiku 4.5 or OpenAI: GPT-5.6 Terra?

It depends on your use case. Claude Haiku 4.5 and OpenAI: GPT-5.6 Terra 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 Haiku 4.5 cost compared to OpenAI: GPT-5.6 Terra?

Claude Haiku 4.5 costs $1/M input tokens and OpenAI: GPT-5.6 Terra costs $2.5/M input tokens. Claude Haiku 4.5 is $1.50/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 OpenAI: GPT-5.6 Terra on Rival?

This page shows a side-by-side comparison of Claude Haiku 4.5 and OpenAI: GPT-5.6 Terra 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 OpenAI: GPT-5.6 Terra?

Claude Haiku 4.5 is developed by Anthropic while OpenAI: GPT-5.6 Terra is developed by OpenAI. Claude Haiku 4.5 has a 200K token context window vs OpenAI: GPT-5.6 Terra's 1.1M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude Haiku 4.5 or OpenAI: GPT-5.6 Terra?

It depends on your use case. Claude Haiku 4.5 and OpenAI: GPT-5.6 Terra 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 Haiku 4.5 cost compared to OpenAI: GPT-5.6 Terra?

Claude Haiku 4.5 costs $1/M input tokens and OpenAI: GPT-5.6 Terra costs $2.5/M input tokens. Claude Haiku 4.5 is $1.50/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 OpenAI: GPT-5.6 Terra on Rival?

This page shows a side-by-side comparison of Claude Haiku 4.5 and OpenAI: GPT-5.6 Terra 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 OpenAI: GPT-5.6 Terra: Which Is Better?

Updated Jul 2026

Our Verdict

OpenAI: GPT-5.6 Terra

Claude Haiku 4.5Runner-up

No community votes yet. On paper, OpenAI: GPT-5.6 Terra has the edge — newer, bigger context window.

Claude Haiku 4.5 is 3.0x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Claude Haiku 4.5

Input

$1.00

2.5× cheaper

Output

$5.00

3.0× cheaper

OpenAI: GPT-5.6 Terra

Input

$2.50

Output

$15.00

Claude Haiku 4.5 is cheaper on both — 2.5× input, 3.0× output

Writing DNA

Style Comparison

Similarity

55%

Claude Haiku 4.5 uses 20.4x more emoji

Claude Haiku 4.5

OpenAI: GPT-5.6 Terra

61%Vocabulary57%

47wSentence Length18w

0.64Hedging0.85

5.1Bold2.8

6.3Lists4.6

0.20Emoji0.00

2.46Headings1.12

0.17Transitions0.06

Based on 24 + 27 text responses

Research

What we learned reading every model

Claude Haiku 4.5 and OpenAI: GPT-5.6 Terra 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 Haiku 4.5 vs MiniMax M3New provider

Claude Haiku 4.5 vs Aurora AlphaNew provider

Claude Haiku 4.5 vs Gemini 2.5 Pro Preview 06-05New provider

Updated Jul 2026

Our Verdict

OpenAI: GPT-5.6 Terra

Claude Haiku 4.5Runner-up

No community votes yet. On paper, OpenAI: GPT-5.6 Terra has the edge — newer, bigger context window.

Claude Haiku 4.5 is 3.0x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Claude Haiku 4.5

Input

$1.00

2.5× cheaper

Output

$5.00

3.0× cheaper

OpenAI: GPT-5.6 Terra

Input

$2.50

Output

$15.00

Claude Haiku 4.5 is cheaper on both — 2.5× input, 3.0× output

Writing DNA

Style Comparison

Similarity

55%

Claude Haiku 4.5 uses 20.4x more emoji

Claude Haiku 4.5

OpenAI: GPT-5.6 Terra

61%Vocabulary57%

47wSentence Length18w

0.64Hedging0.85

5.1Bold2.8

6.3Lists4.6

0.20Emoji0.00

2.46Headings1.12

0.17Transitions0.06

Based on 24 + 27 text responses

Research

What we learned reading every model

Claude Haiku 4.5 and OpenAI: GPT-5.6 Terra 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 Haiku 4.5 vs MiniMax M3New provider

Claude Haiku 4.5 vs Aurora AlphaNew provider

Claude Haiku 4.5 vs Gemini 2.5 Pro Preview 06-05New provider