What is the difference between Claude Opus 4.8 and GPT-4?

Claude Opus 4.8 is developed by Anthropic while GPT-4 is developed by OpenAI. Claude Opus 4.8 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 4.8 or GPT-4?

It depends on your use case. Claude Opus 4.8 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 4.8 cost compared to GPT-4?

Claude Opus 4.8 costs $5/M input tokens and GPT-4 costs $30/M input tokens. Claude Opus 4.8 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 4.8 and GPT-4 on Rival?

This page shows a side-by-side comparison of Claude Opus 4.8 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 4.8 and GPT-4?

Claude Opus 4.8 is developed by Anthropic while GPT-4 is developed by OpenAI. Claude Opus 4.8 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 4.8 or GPT-4?

It depends on your use case. Claude Opus 4.8 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 4.8 cost compared to GPT-4?

Claude Opus 4.8 costs $5/M input tokens and GPT-4 costs $30/M input tokens. Claude Opus 4.8 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 4.8 and GPT-4 on Rival?

This page shows a side-by-side comparison of Claude Opus 4.8 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 4.8 vs GPT-4: Which Is Better?

Updated May 2026

Our Verdict

Claude Opus 4.8

GPT-4Runner-up

No community votes yet. On paper, Claude Opus 4.8 has the edge — newer, bigger context window.

Too close to call

API pricing

Cost per 1M tokens

Claude Opus 4.8

Input

$5.00

6.0× cheaper

Output

$25.00

2.4× cheaper

GPT-4

Input

$30.00

Output

$60.00

Claude Opus 4.8 is cheaper on both — 6.0× input, 2.4× output

Writing DNA

Style Comparison

Similarity

35%

Claude Opus 4.8 uses 77.6x more emoji

Claude Opus 4.8

GPT-4

60%Vocabulary59%

19wSentence Length18w

0.46Hedging1.10

4.7Bold0.8

3.2Lists2.5

0.78Emoji0.00

1.15Headings0.00

0.04Transitions0.45

Based on 27 + 15 text responses

Research

What we learned reading every model

Claude Opus 4.8 and GPT-4 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 vs MiniMax M3New provider

Claude Opus 4.8 vs Gemini 2.5 Pro Preview 06-05New provider

GPT-4 vs Grok 3New provider

Updated May 2026

Our Verdict

Claude Opus 4.8

GPT-4Runner-up

No community votes yet. On paper, Claude Opus 4.8 has the edge — newer, bigger context window.

Too close to call

API pricing

Cost per 1M tokens

Claude Opus 4.8

Input

$5.00

6.0× cheaper

Output

$25.00

2.4× cheaper

GPT-4

Input

$30.00

Output

$60.00

Claude Opus 4.8 is cheaper on both — 6.0× input, 2.4× output

Writing DNA

Style Comparison

Similarity

35%

Claude Opus 4.8 uses 77.6x more emoji

Claude Opus 4.8

GPT-4

60%Vocabulary59%

19wSentence Length18w

0.46Hedging1.10

4.7Bold0.8

3.2Lists2.5

0.78Emoji0.00

1.15Headings0.00

0.04Transitions0.45

Based on 27 + 15 text responses

Research

What we learned reading every model

Claude Opus 4.8 and GPT-4 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 vs MiniMax M3New provider

Claude Opus 4.8 vs Gemini 2.5 Pro Preview 06-05New provider

GPT-4 vs Grok 3New provider