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

Claude Opus 5 is developed by Anthropic while GPT-4 is developed by OpenAI. Claude Opus 5 has a 1.0M token context window vs GPT-4's 8K. You can compare their actual outputs across 26 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 5 or GPT-4?

It depends on your use case. Claude Opus 5 and GPT-4 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 26 challenges so you can judge which fits your needs best.

How much does Claude Opus 5 cost compared to GPT-4?

Claude Opus 5 costs $5/M input tokens and GPT-4 costs $30/M input tokens. Claude Opus 5 is $25.00/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 on Rival?

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

Claude Opus 5 is developed by Anthropic while GPT-4 is developed by OpenAI. Claude Opus 5 has a 1.0M token context window vs GPT-4's 8K. You can compare their actual outputs across 26 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 5 or GPT-4?

It depends on your use case. Claude Opus 5 and GPT-4 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 26 challenges so you can judge which fits your needs best.

How much does Claude Opus 5 cost compared to GPT-4?

Claude Opus 5 costs $5/M input tokens and GPT-4 costs $30/M input tokens. Claude Opus 5 is $25.00/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 on Rival?

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

Updated Jul 2026

Our Verdict

Claude Opus 5

GPT-4Runner-up

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

Too close to call

What do Claude Opus 5 and GPT-4 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 Opus 5

Input

$5.00

6.0× cheaper

Output

$25.00

2.4× cheaper

GPT-4

Input

$30.00

Output

$60.00

Claude Opus 5 is cheaper on both — 6.0× input, 2.4× output

Writing DNA

Style Comparison

Similarity

51%

Claude Opus 5 uses 1.7x more emoji

Claude Opus 5

GPT-4

54%Vocabulary59%

21wSentence Length18w

0.40Hedging1.10

3.9Bold0.8

1.9Lists2.5

0.02Emoji0.00

0.71Headings0.00

0.05Transitions0.45

Based on 27 + 15 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

GPT-4 vs MiniMax M3New provider

GPT-4 vs Ox AlphaNew provider

GPT-4 vs Gemini 2.5 Pro Preview 06-05New provider

Updated Jul 2026

Our Verdict

Claude Opus 5

GPT-4Runner-up

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

Too close to call

What do Claude Opus 5 and GPT-4 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 Opus 5

Input

$5.00

6.0× cheaper

Output

$25.00

2.4× cheaper

GPT-4

Input

$30.00

Output

$60.00

Claude Opus 5 is cheaper on both — 6.0× input, 2.4× output

Writing DNA

Style Comparison

Similarity

51%

Claude Opus 5 uses 1.7x more emoji

Claude Opus 5

GPT-4

54%Vocabulary59%

21wSentence Length18w

0.40Hedging1.10

3.9Bold0.8

1.9Lists2.5

0.02Emoji0.00

0.71Headings0.00

0.05Transitions0.45

Based on 27 + 15 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

GPT-4 vs MiniMax M3New provider

GPT-4 vs Ox AlphaNew provider

GPT-4 vs Gemini 2.5 Pro Preview 06-05New provider