What is the difference between Claude Opus 4.5 and DeepSeek V4 Flash 0731?

Claude Opus 4.5 is developed by Anthropic while DeepSeek V4 Flash 0731 is developed by DeepSeek. You can compare their actual outputs across 42 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4.5 or DeepSeek V4 Flash 0731?

It depends on your use case. Claude Opus 4.5 and DeepSeek V4 Flash 0731 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 42 challenges so you can judge which fits your needs best.

How can I compare Claude Opus 4.5 and DeepSeek V4 Flash 0731 on Rival?

This page shows a side-by-side comparison of Claude Opus 4.5 and DeepSeek V4 Flash 0731 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 4.5 and DeepSeek V4 Flash 0731?

Claude Opus 4.5 is developed by Anthropic while DeepSeek V4 Flash 0731 is developed by DeepSeek. You can compare their actual outputs across 42 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4.5 or DeepSeek V4 Flash 0731?

It depends on your use case. Claude Opus 4.5 and DeepSeek V4 Flash 0731 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 42 challenges so you can judge which fits your needs best.

How can I compare Claude Opus 4.5 and DeepSeek V4 Flash 0731 on Rival?

This page shows a side-by-side comparison of Claude Opus 4.5 and DeepSeek V4 Flash 0731 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 4.5 vs DeepSeek V4 Flash 0731: Which Is Better?

Updated Jul 2026

Our Verdict

Claude Opus 4.5

DeepSeek V4 Flash 0731

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

Too close to call

API pricing

Cost per 1M tokens

Claude Opus 4.5

Input

—

Output

—

DeepSeek V4 Flash 0731

Input

$0.14

Output

$0.28

Writing DNA

Style Comparison

Similarity

43%

Claude Opus 4.5 uses 15.2x more emoji

Claude Opus 4.5

DeepSeek V4 Flash 0731

64%Vocabulary52%

55wSentence Length18w

0.86Hedging0.38

5.8Bold5.7

4.5Lists3.4

0.15Emoji0.00

1.59Headings0.83

0.05Transitions0.04

Based on 24 + 23 text responses

Research

What we learned reading every model

Claude Opus 4.5 and DeepSeek V4 Flash 0731 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

DeepSeek V4 Flash 0731 vs MiniMax M3New provider

DeepSeek V4 Flash 0731 vs Gemini 2.5 Pro Preview 06-05New provider

DeepSeek V4 Flash 0731 vs GPT-5New provider

Updated Jul 2026

Our Verdict

Claude Opus 4.5

DeepSeek V4 Flash 0731

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

Too close to call

API pricing

Cost per 1M tokens

Claude Opus 4.5

Input

—

Output

—

DeepSeek V4 Flash 0731

Input

$0.14

Output

$0.28

Writing DNA

Style Comparison

Similarity

43%

Claude Opus 4.5 uses 15.2x more emoji

Claude Opus 4.5

DeepSeek V4 Flash 0731

64%Vocabulary52%

55wSentence Length18w

0.86Hedging0.38

5.8Bold5.7

4.5Lists3.4

0.15Emoji0.00

1.59Headings0.83

0.05Transitions0.04

Based on 24 + 23 text responses

Research

What we learned reading every model

Claude Opus 4.5 and DeepSeek V4 Flash 0731 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

DeepSeek V4 Flash 0731 vs MiniMax M3New provider

DeepSeek V4 Flash 0731 vs Gemini 2.5 Pro Preview 06-05New provider

DeepSeek V4 Flash 0731 vs GPT-5New provider