What is the difference between Claude Opus 4 and GPT-5 Nano?

Claude Opus 4 is developed by Anthropic while GPT-5 Nano 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 Opus 4 or GPT-5 Nano?

It depends on your use case. Claude Opus 4 and GPT-5 Nano 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 Opus 4 and GPT-5 Nano on Rival?

This page shows a side-by-side comparison of Claude Opus 4 and GPT-5 Nano 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 Opus 4 and GPT-5 Nano?

Claude Opus 4 is developed by Anthropic while GPT-5 Nano 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 Opus 4 or GPT-5 Nano?

It depends on your use case. Claude Opus 4 and GPT-5 Nano 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 Opus 4 and GPT-5 Nano on Rival?

This page shows a side-by-side comparison of Claude Opus 4 and GPT-5 Nano 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 Opus 4 vs GPT-5 Nano: Which Is Better?

Updated Aug 2025

Our Verdict

Claude Opus 4

GPT-5 Nano

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call

API pricing

Cost per 1M tokens

Claude Opus 4

Input

$15.00

Output

$75.00

GPT-5 Nano

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

49%

Claude Opus 4 uses 444.0x more bold

Claude Opus 4

GPT-5 Nano

64%Vocabulary59%

62wSentence Length25w

0.52Hedging0.23

4.4Bold0.0

9.1Lists4.2

0.11Emoji0.00

1.87Headings0.00

0.27Transitions0.01

Based on 16 + 14 text responses

Research

What we learned reading every model

Claude Opus 4 and GPT-5 Nano 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

GPT-5 Nano vs MiniMax M1New provider

GPT-5 Nano vs Gemini 2.5 Pro Preview 06-05New provider

GPT-5 Nano vs Claude Sonnet 4Cross-provider

Updated Aug 2025

Our Verdict

Claude Opus 4

GPT-5 Nano

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call

API pricing

Cost per 1M tokens

Claude Opus 4

Input

$15.00

Output

$75.00

GPT-5 Nano

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

49%

Claude Opus 4 uses 444.0x more bold

Claude Opus 4

GPT-5 Nano

64%Vocabulary59%

62wSentence Length25w

0.52Hedging0.23

4.4Bold0.0

9.1Lists4.2

0.11Emoji0.00

1.87Headings0.00

0.27Transitions0.01

Based on 16 + 14 text responses

Research

What we learned reading every model

Claude Opus 4 and GPT-5 Nano 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

GPT-5 Nano vs MiniMax M1New provider

GPT-5 Nano vs Gemini 2.5 Pro Preview 06-05New provider

GPT-5 Nano vs Claude Sonnet 4Cross-provider