What is the difference between Claude Opus 4.1 and Mistral Small 4?

Claude Opus 4.1 is developed by Anthropic while Mistral Small 4 is developed by Mistral AI. Claude Opus 4.1 has a 200K token context window vs Mistral Small 4's 262K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4.1 or Mistral Small 4?

It depends on your use case. Claude Opus 4.1 and Mistral Small 4 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 4.1 cost compared to Mistral Small 4?

Claude Opus 4.1 costs $15/M input tokens and Mistral Small 4 costs $0.15/M input tokens. Mistral Small 4 is $14.85/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 Mistral Small 4 on Rival?

This page shows a side-by-side comparison of Claude Opus 4.1 and Mistral Small 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 4.1 and Mistral Small 4?

Claude Opus 4.1 is developed by Anthropic while Mistral Small 4 is developed by Mistral AI. Claude Opus 4.1 has a 200K token context window vs Mistral Small 4's 262K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4.1 or Mistral Small 4?

It depends on your use case. Claude Opus 4.1 and Mistral Small 4 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 4.1 cost compared to Mistral Small 4?

Claude Opus 4.1 costs $15/M input tokens and Mistral Small 4 costs $0.15/M input tokens. Mistral Small 4 is $14.85/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 Mistral Small 4 on Rival?

This page shows a side-by-side comparison of Claude Opus 4.1 and Mistral Small 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 4.1 vs Mistral Small 4: Which Is Better?

Rival

Updated Mar 2026

Our Verdict

Claude Opus 4.1

Mistral Small 4Runner-up

No community votes yet. On paper, Claude Opus 4.1 has the edge — bigger model tier, major provider backing.

Mistral Small 4 is 125x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Claude Opus 4.1

Input

$15.00

Output

$75.00

Mistral Small 4

Input

$0.15

100× cheaper

Output

$0.60

125× cheaper

Mistral Small 4 is cheaper on both — 100× input, 125× output

Writing DNA

Style Comparison

Similarity

48%

Claude Opus 4.1 uses 4.9x more sentence length

Claude Opus 4.1

Mistral Small 4

61%Vocabulary50%

87wSentence Length18w

0.54Hedging0.58

5.1Bold9.0

6.7Lists5.6

0.38Emoji0.19

1.68Headings1.10

0.13Transitions0.12

Based on 17 + 23 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Mistral Small 4 vs MiniMax M3New provider

Mistral Small 4 vs GPT-5New provider

Mistral Small 4 vs Llama 4 MaverickNew provider

Rival

Updated Mar 2026

Our Verdict

Claude Opus 4.1

Mistral Small 4Runner-up

No community votes yet. On paper, Claude Opus 4.1 has the edge — bigger model tier, major provider backing.

Mistral Small 4 is 125x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Claude Opus 4.1

Input

$15.00

Output

$75.00

Mistral Small 4

Input

$0.15

100× cheaper

Output

$0.60

125× cheaper

Mistral Small 4 is cheaper on both — 100× input, 125× output

Writing DNA

Style Comparison

Similarity

48%

Claude Opus 4.1 uses 4.9x more sentence length

Claude Opus 4.1

Mistral Small 4

61%Vocabulary50%

87wSentence Length18w

0.54Hedging0.58

5.1Bold9.0

6.7Lists5.6

0.38Emoji0.19

1.68Headings1.10

0.13Transitions0.12

Based on 17 + 23 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Mistral Small 4 vs MiniMax M3New provider

Mistral Small 4 vs GPT-5New provider

Mistral Small 4 vs Llama 4 MaverickNew provider

Rival