What is the difference between Claude Opus 4.1 and DeepSeek R1?

Claude Opus 4.1 is developed by Anthropic while DeepSeek R1 is developed by DeepSeek. Claude Opus 4.1 has a 200K token context window vs DeepSeek R1's 128K. You can compare their actual outputs across 52 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4.1 or DeepSeek R1?

It depends on your use case. Claude Opus 4.1 and DeepSeek R1 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 52 challenges so you can judge which fits your needs best.

How much does Claude Opus 4.1 cost compared to DeepSeek R1?

Claude Opus 4.1 costs $15/M input tokens and DeepSeek R1 costs $0.55/M input tokens. DeepSeek R1 is $14.45/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 4.1 and DeepSeek R1 on Rival?

This page shows a side-by-side comparison of Claude Opus 4.1 and DeepSeek R1 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 4.1 and DeepSeek R1?

Claude Opus 4.1 is developed by Anthropic while DeepSeek R1 is developed by DeepSeek. Claude Opus 4.1 has a 200K token context window vs DeepSeek R1's 128K. You can compare their actual outputs across 52 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4.1 or DeepSeek R1?

It depends on your use case. Claude Opus 4.1 and DeepSeek R1 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 52 challenges so you can judge which fits your needs best.

How much does Claude Opus 4.1 cost compared to DeepSeek R1?

Claude Opus 4.1 costs $15/M input tokens and DeepSeek R1 costs $0.55/M input tokens. DeepSeek R1 is $14.45/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 4.1 and DeepSeek R1 on Rival?

This page shows a side-by-side comparison of Claude Opus 4.1 and DeepSeek R1 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 4.1 vs DeepSeek R1: Which Is Better?

Updated Aug 2025

Our Verdict

Claude Opus 4.1

DeepSeek R1Runner-up

No community votes yet. On paper, Claude Opus 4.1 has the edge — bigger model tier, newer, bigger context window.

DeepSeek R1 is 34x cheaper per token — worth considering if cost matters.

Slight edge

API pricing

Cost per 1M tokens

Claude Opus 4.1

Input

$15.00

Output

$75.00

DeepSeek R1

Input

$0.55

27× cheaper

Output

$2.19

34× cheaper

DeepSeek R1 is cheaper on both — 27× input, 34× output

Writing DNA

Style Comparison

Similarity

48%

Claude Opus 4.1 uses 8.9x more emoji

Claude Opus 4.1

DeepSeek R1

61%Vocabulary62%

87wSentence Length15w

0.54Hedging0.52

5.1Bold8.0

6.7Lists5.7

0.38Emoji0.04

1.68Headings0.62

0.13Transitions0.28

Based on 17 + 22 text responses

Research

What we learned reading every model

Claude Opus 4.1 and DeepSeek R1 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 R1 vs MiniMax M3New provider

DeepSeek R1 vs GPT-5New provider

DeepSeek R1 vs Llama 4 MaverickNew provider

Updated Aug 2025

Our Verdict

Claude Opus 4.1

DeepSeek R1Runner-up

No community votes yet. On paper, Claude Opus 4.1 has the edge — bigger model tier, newer, bigger context window.

DeepSeek R1 is 34x cheaper per token — worth considering if cost matters.

Slight edge

API pricing

Cost per 1M tokens

Claude Opus 4.1

Input

$15.00

Output

$75.00

DeepSeek R1

Input

$0.55

27× cheaper

Output

$2.19

34× cheaper

DeepSeek R1 is cheaper on both — 27× input, 34× output

Writing DNA

Style Comparison

Similarity

48%

Claude Opus 4.1 uses 8.9x more emoji

Claude Opus 4.1

DeepSeek R1

61%Vocabulary62%

87wSentence Length15w

0.54Hedging0.52

5.1Bold8.0

6.7Lists5.7

0.38Emoji0.04

1.68Headings0.62

0.13Transitions0.28

Based on 17 + 22 text responses

Research

What we learned reading every model

Claude Opus 4.1 and DeepSeek R1 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 R1 vs MiniMax M3New provider

DeepSeek R1 vs GPT-5New provider

DeepSeek R1 vs Llama 4 MaverickNew provider