What is the difference between Claude Opus 4.6 and Claude Sonnet 4?

Both are developed by Anthropic but target different use cases. Claude Opus 4.6 has a 1.0M token context window vs Claude Sonnet 4's 200K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4.6 or Claude Sonnet 4?

It depends on your use case. Claude Opus 4.6 and Claude Sonnet 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 4.6 cost compared to Claude Sonnet 4?

Claude Opus 4.6 costs $5/M input tokens and Claude Sonnet 4 costs $3/M input tokens. Claude Sonnet 4 is $2.00/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 4.6 and Claude Sonnet 4 on Rival?

This page shows a side-by-side comparison of Claude Opus 4.6 and Claude Sonnet 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 4.6 and Claude Sonnet 4?

Both are developed by Anthropic but target different use cases. Claude Opus 4.6 has a 1.0M token context window vs Claude Sonnet 4's 200K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4.6 or Claude Sonnet 4?

It depends on your use case. Claude Opus 4.6 and Claude Sonnet 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 4.6 cost compared to Claude Sonnet 4?

Claude Opus 4.6 costs $5/M input tokens and Claude Sonnet 4 costs $3/M input tokens. Claude Sonnet 4 is $2.00/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 4.6 and Claude Sonnet 4 on Rival?

This page shows a side-by-side comparison of Claude Opus 4.6 and Claude Sonnet 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.

Updated Feb 2026

Claude Opus 4.6vsClaude Sonnet 4

Claude Sonnet 4 is cheaper than Claude Opus 4.6 at $3/M vs $5/M input tokens.

Claude Opus 4.6 and Claude Sonnet 4 compared across 53 shared prompts
Spec	Claude Opus 4.6	Claude Sonnet 4
Input price	$5/M tokens	$3/M tokens
Output price	$25/M tokens	$15/M tokens
Context window	1.0M tokens	200K tokens
Released	Feb 2026	May 2025
SWE-bench Verified	80.8%	72.7%

Our Verdict

Claude Opus 4.6

Claude Sonnet 4Runner-up

Not enough votes to call it. On the specs, Claude Opus 4.6 has the edge: bigger model tier, newer, bigger context window.

Slight edge

API pricing

Cost per 1M tokens

Claude Opus 4.6

Input

$5.00

Output

$25.00

Claude Sonnet 4

Input

$3.00

1.7× cheaper

Output

$15.00

1.7× cheaper

Claude Sonnet 4 is cheaper on both — 1.7× input, 1.7× output

Writing DNA

Style Comparison

Similarity

80%

Claude Sonnet 4 uses 8.2x more transitions

Claude Opus 4.6

Claude Sonnet 4

56%Vocabulary64%

33wSentence Length81w

0.73Hedging0.56

5.3Bold4.5

2.7Lists6.6

1.16Emoji0.70

1.23Headings1.59

0.02Transitions0.20

Based on 26 + 28 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

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Claude Opus 4.6 vs MiniMax M3New provider

Claude Opus 4.6 vs GPT-5New provider

Claude Opus 4.6 vs MiniMax M1New provider

Claude Opus 4.6 vs MiniMax M2New provider

Claude Opus 4.6 vs MiniMax M2-herNew provider

Claude Opus 4.6 vs MiniMax M2.1New provider

Claude Opus 4.6 vs MiniMax M2.5New provider

Updated Feb 2026

Claude Opus 4.6vsClaude Sonnet 4

Claude Sonnet 4 is cheaper than Claude Opus 4.6 at $3/M vs $5/M input tokens.

Claude Opus 4.6 and Claude Sonnet 4 compared across 53 shared prompts
Spec	Claude Opus 4.6	Claude Sonnet 4
Input price	$5/M tokens	$3/M tokens
Output price	$25/M tokens	$15/M tokens
Context window	1.0M tokens	200K tokens
Released	Feb 2026	May 2025
SWE-bench Verified	80.8%	72.7%

Our Verdict

Claude Opus 4.6

Claude Sonnet 4Runner-up

Not enough votes to call it. On the specs, Claude Opus 4.6 has the edge: bigger model tier, newer, bigger context window.

Slight edge

API pricing

Cost per 1M tokens

Claude Opus 4.6

Input

$5.00

Output

$25.00

Claude Sonnet 4

Input

$3.00

1.7× cheaper

Output

$15.00

1.7× cheaper

Claude Sonnet 4 is cheaper on both — 1.7× input, 1.7× output

Writing DNA

Style Comparison

Similarity

80%

Claude Sonnet 4 uses 8.2x more transitions

Claude Opus 4.6

Claude Sonnet 4

56%Vocabulary64%

33wSentence Length81w

0.73Hedging0.56

5.3Bold4.5

2.7Lists6.6

1.16Emoji0.70

1.23Headings1.59

0.02Transitions0.20

Based on 26 + 28 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Claude Opus 4.6 vs Ox AlphaNew provider

Claude Opus 4.6 vs MiniMax M3New provider

Claude Opus 4.6 vs GPT-5New provider

Claude Opus 4.6 vs MiniMax M1New provider

Claude Opus 4.6 vs MiniMax M2New provider

Claude Opus 4.6 vs MiniMax M2-herNew provider

Claude Opus 4.6 vs MiniMax M2.1New provider

Claude Opus 4.6 vs MiniMax M2.5New provider