What is the difference between Claude 3 Opus and GPT-5 Mini?

Claude 3 Opus is developed by Anthropic while GPT-5 Mini is developed by OpenAI. You can compare their actual outputs across 12 challenges on Rival to see how they differ in practice.

Which is better, Claude 3 Opus or GPT-5 Mini?

It depends on your use case. Claude 3 Opus and GPT-5 Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 12 challenges so you can judge which fits your needs best.

How much does Claude 3 Opus cost compared to GPT-5 Mini?

Claude 3 Opus costs $15/M input tokens and GPT-5 Mini costs $0.25/M input tokens. GPT-5 Mini is $14.75/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 3 Opus and GPT-5 Mini on Rival?

This page shows a side-by-side comparison of Claude 3 Opus and GPT-5 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 3 Opus and GPT-5 Mini?

Claude 3 Opus is developed by Anthropic while GPT-5 Mini is developed by OpenAI. You can compare their actual outputs across 12 challenges on Rival to see how they differ in practice.

Which is better, Claude 3 Opus or GPT-5 Mini?

It depends on your use case. Claude 3 Opus and GPT-5 Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 12 challenges so you can judge which fits your needs best.

How much does Claude 3 Opus cost compared to GPT-5 Mini?

Claude 3 Opus costs $15/M input tokens and GPT-5 Mini costs $0.25/M input tokens. GPT-5 Mini is $14.75/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 3 Opus and GPT-5 Mini on Rival?

This page shows a side-by-side comparison of Claude 3 Opus and GPT-5 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 3 Opus vs GPT-5 Mini: Which Is Better?

Updated Aug 2025

Our Verdict

Claude 3 Opus

GPT-5 Mini

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

GPT-5 Mini is 38x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Claude 3 Opus

Input

$15.00

Output

$75.00

GPT-5 Mini

Input

$0.25

60× cheaper

Output

$2.00

38× cheaper

GPT-5 Mini is cheaper on both — 60× input, 38× output

Writing DNA

Style Comparison

Similarity

48%

Claude 3 Opus uses 2.9x more hedging

Claude 3 Opus

GPT-5 Mini

54%Vocabulary62%

14wSentence Length21w

0.48Hedging0.16

0.0Bold0.0

3.0Lists3.4

0.00Emoji0.00

0.00Headings0.00

0.06Transitions0.05

Based on 3 + 15 text responses

Research

What we learned reading every model

Claude 3 Opus and GPT-5 Mini 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 Mini vs Llama 4 MaverickNew provider

Claude 3 Opus vs MiniMax M3New provider

Claude 3 Opus vs Grok 3New provider

Updated Aug 2025

Our Verdict

Claude 3 Opus

GPT-5 Mini

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

GPT-5 Mini is 38x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Claude 3 Opus

Input

$15.00

Output

$75.00

GPT-5 Mini

Input

$0.25

60× cheaper

Output

$2.00

38× cheaper

GPT-5 Mini is cheaper on both — 60× input, 38× output

Writing DNA

Style Comparison

Similarity

48%

Claude 3 Opus uses 2.9x more hedging

Claude 3 Opus

GPT-5 Mini

54%Vocabulary62%

14wSentence Length21w

0.48Hedging0.16

0.0Bold0.0

3.0Lists3.4

0.00Emoji0.00

0.00Headings0.00

0.06Transitions0.05

Based on 3 + 15 text responses

Research

What we learned reading every model

Claude 3 Opus and GPT-5 Mini 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 Mini vs Llama 4 MaverickNew provider

Claude 3 Opus vs MiniMax M3New provider

Claude 3 Opus vs Grok 3New provider