What is the difference between Claude Opus 5 and GPT-5.4 Mini?

Claude Opus 5 is developed by Anthropic while GPT-5.4 Mini is developed by OpenAI. Claude Opus 5 has a 1.0M token context window vs GPT-5.4 Mini's 400K. 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-5.4 Mini?

It depends on your use case. Claude Opus 5 and GPT-5.4 Mini 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-5.4 Mini?

Claude Opus 5 costs $5/M input tokens and GPT-5.4 Mini costs $0.75/M input tokens. GPT-5.4 Mini is $4.25/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-5.4 Mini on Rival?

This page shows a side-by-side comparison of Claude Opus 5 and GPT-5.4 Mini 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-5.4 Mini?

Claude Opus 5 is developed by Anthropic while GPT-5.4 Mini is developed by OpenAI. Claude Opus 5 has a 1.0M token context window vs GPT-5.4 Mini's 400K. 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-5.4 Mini?

It depends on your use case. Claude Opus 5 and GPT-5.4 Mini 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-5.4 Mini?

Claude Opus 5 costs $5/M input tokens and GPT-5.4 Mini costs $0.75/M input tokens. GPT-5.4 Mini is $4.25/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-5.4 Mini on Rival?

This page shows a side-by-side comparison of Claude Opus 5 and GPT-5.4 Mini 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-5.4 Mini: Which Is Better?

Updated Jul 2026

Our Verdict

Claude Opus 5

GPT-5.4 MiniRunner-up

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

GPT-5.4 Mini is 5.6x cheaper per token — worth considering if cost matters.

Slight edge

What do Claude Opus 5 and GPT-5.4 Mini 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

Output

$25.00

GPT-5.4 Mini

Input

$0.75

6.7× cheaper

Output

$4.50

5.6× cheaper

GPT-5.4 Mini is cheaper on both — 6.7× input, 5.6× output

Writing DNA

Style Comparison

Similarity

46%

Claude Opus 5 uses 1.7x more emoji

Claude Opus 5

GPT-5.4 Mini

54%Vocabulary54%

21wSentence Length20w

0.40Hedging0.72

3.9Bold6.0

1.9Lists8.3

0.02Emoji0.00

0.71Headings2.11

0.05Transitions0.04

Based on 27 + 23 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

GPT-5.4 Mini vs MiniMax M3New provider

GPT-5.4 Mini vs Gemini 2.5 Pro Preview 06-05New provider

GPT-5.4 Mini vs Claude Opus 4Cross-provider

Updated Jul 2026

Our Verdict

Claude Opus 5

GPT-5.4 MiniRunner-up

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

GPT-5.4 Mini is 5.6x cheaper per token — worth considering if cost matters.

Slight edge

What do Claude Opus 5 and GPT-5.4 Mini 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

Output

$25.00

GPT-5.4 Mini

Input

$0.75

6.7× cheaper

Output

$4.50

5.6× cheaper

GPT-5.4 Mini is cheaper on both — 6.7× input, 5.6× output

Writing DNA

Style Comparison

Similarity

46%

Claude Opus 5 uses 1.7x more emoji

Claude Opus 5

GPT-5.4 Mini

54%Vocabulary54%

21wSentence Length20w

0.40Hedging0.72

3.9Bold6.0

1.9Lists8.3

0.02Emoji0.00

0.71Headings2.11

0.05Transitions0.04

Based on 27 + 23 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

GPT-5.4 Mini vs MiniMax M3New provider

GPT-5.4 Mini vs Gemini 2.5 Pro Preview 06-05New provider

GPT-5.4 Mini vs Claude Opus 4Cross-provider