What is the difference between Claude Opus 5 and GPT-4.1 Nano?

Claude Opus 5 is developed by Anthropic while GPT-4.1 Nano is developed by OpenAI. Claude Opus 5 has a 1.0M token context window vs GPT-4.1 Nano's 1.0M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 5 or GPT-4.1 Nano?

It depends on your use case. Claude Opus 5 and GPT-4.1 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 much does Claude Opus 5 cost compared to GPT-4.1 Nano?

Claude Opus 5 costs $5/M input tokens and GPT-4.1 Nano costs $0.1/M input tokens. GPT-4.1 Nano is $4.90/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 Opus 5 and GPT-4.1 Nano on Rival?

This page shows a side-by-side comparison of Claude Opus 5 and GPT-4.1 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 5 and GPT-4.1 Nano?

Claude Opus 5 is developed by Anthropic while GPT-4.1 Nano is developed by OpenAI. Claude Opus 5 has a 1.0M token context window vs GPT-4.1 Nano's 1.0M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 5 or GPT-4.1 Nano?

It depends on your use case. Claude Opus 5 and GPT-4.1 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 much does Claude Opus 5 cost compared to GPT-4.1 Nano?

Claude Opus 5 costs $5/M input tokens and GPT-4.1 Nano costs $0.1/M input tokens. GPT-4.1 Nano is $4.90/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 Opus 5 and GPT-4.1 Nano on Rival?

This page shows a side-by-side comparison of Claude Opus 5 and GPT-4.1 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 5 vs GPT-4.1 Nano: Which Is Better?

Updated Jul 2026

Our Verdict

Claude Opus 5

GPT-4.1 NanoRunner-up

No community votes yet. On paper, Claude Opus 5 has the edge — bigger model tier, newer.

GPT-4.1 Nano is 63x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Claude Opus 5

Input

$5.00

Output

$25.00

GPT-4.1 Nano

Input

$0.10

50× cheaper

Output

$0.40

63× cheaper

GPT-4.1 Nano is cheaper on both — 50× input, 63× output

Writing DNA

Style Comparison

Similarity

28%

Claude Opus 5 uses 1.7x more emoji

Claude Opus 5

GPT-4.1 Nano

54%Vocabulary57%

21wSentence Length25w

0.40Hedging0.72

3.9Bold5.6

1.9Lists4.9

0.02Emoji0.00

0.71Headings0.71

0.05Transitions0.22

Based on 27 + 24 text responses

Research

What we learned reading every model

Claude Opus 5 and GPT-4.1 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-4.1 Nano vs MiniMax M3New provider

GPT-4.1 Nano vs Gemini 2.5 Pro Preview 06-05New provider

GPT-4.1 Nano vs Claude Opus 4Cross-provider

Updated Jul 2026

Our Verdict

Claude Opus 5

GPT-4.1 NanoRunner-up

No community votes yet. On paper, Claude Opus 5 has the edge — bigger model tier, newer.

GPT-4.1 Nano is 63x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Claude Opus 5

Input

$5.00

Output

$25.00

GPT-4.1 Nano

Input

$0.10

50× cheaper

Output

$0.40

63× cheaper

GPT-4.1 Nano is cheaper on both — 50× input, 63× output

Writing DNA

Style Comparison

Similarity

28%

Claude Opus 5 uses 1.7x more emoji

Claude Opus 5

GPT-4.1 Nano

54%Vocabulary57%

21wSentence Length25w

0.40Hedging0.72

3.9Bold5.6

1.9Lists4.9

0.02Emoji0.00

0.71Headings0.71

0.05Transitions0.22

Based on 27 + 24 text responses

Research

What we learned reading every model

Claude Opus 5 and GPT-4.1 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-4.1 Nano vs MiniMax M3New provider

GPT-4.1 Nano vs Gemini 2.5 Pro Preview 06-05New provider

GPT-4.1 Nano vs Claude Opus 4Cross-provider