What is the difference between Claude Sonnet 5 and xAI: Grok 4?

Claude Sonnet 5 is developed by Anthropic while xAI: Grok 4 is developed by xAI. Claude Sonnet 5 has a 1.0M token context window vs xAI: Grok 4's 256K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude Sonnet 5 or xAI: Grok 4?

It depends on your use case. Claude Sonnet 5 and xAI: Grok 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 Sonnet 5 cost compared to xAI: Grok 4?

Claude Sonnet 5 costs $2/M input tokens and xAI: Grok 4 costs $3/M input tokens. Claude Sonnet 5 is $1.00/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 Sonnet 5 and xAI: Grok 4 on Rival?

This page shows a side-by-side comparison of Claude Sonnet 5 and xAI: Grok 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 Sonnet 5 and xAI: Grok 4?

Claude Sonnet 5 is developed by Anthropic while xAI: Grok 4 is developed by xAI. Claude Sonnet 5 has a 1.0M token context window vs xAI: Grok 4's 256K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude Sonnet 5 or xAI: Grok 4?

It depends on your use case. Claude Sonnet 5 and xAI: Grok 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 Sonnet 5 cost compared to xAI: Grok 4?

Claude Sonnet 5 costs $2/M input tokens and xAI: Grok 4 costs $3/M input tokens. Claude Sonnet 5 is $1.00/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 Sonnet 5 and xAI: Grok 4 on Rival?

This page shows a side-by-side comparison of Claude Sonnet 5 and xAI: Grok 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 Sonnet 5 vs xAI: Grok 4: Which Is Better?

Updated Jun 2026

Our Verdict

Claude Sonnet 5

xAI: Grok 4Runner-up

No community votes yet. On paper, Claude Sonnet 5 has the edge — newer, bigger context window.

Too close to call

API pricing

Cost per 1M tokens

Claude Sonnet 5

Input

$2.00

1.5× cheaper

Output

$10.00

1.5× cheaper

xAI: Grok 4

Input

$3.00

Output

$15.00

Claude Sonnet 5 is cheaper on both — 1.5× input, 1.5× output

Writing DNA

Style Comparison

Similarity

44%

Claude Sonnet 5 uses 11.3x more emoji

Claude Sonnet 5

xAI: Grok 4

59%Vocabulary53%

35wSentence Length18w

0.53Hedging0.67

3.5Bold2.7

3.5Lists2.7

0.79Emoji0.07

1.25Headings0.86

0.06Transitions0.04

Based on 27 + 21 text responses

Research

What we learned reading every model

Claude Sonnet 5 and xAI: Grok 4 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

xAI: Grok 4 vs MiniMax M3New provider

xAI: Grok 4 vs Claude Sonnet 4Cross-provider

xAI: Grok 4 vs Pony AlphaNew provider

Updated Jun 2026

Our Verdict

Claude Sonnet 5

xAI: Grok 4Runner-up

No community votes yet. On paper, Claude Sonnet 5 has the edge — newer, bigger context window.

Too close to call

API pricing

Cost per 1M tokens

Claude Sonnet 5

Input

$2.00

1.5× cheaper

Output

$10.00

1.5× cheaper

xAI: Grok 4

Input

$3.00

Output

$15.00

Claude Sonnet 5 is cheaper on both — 1.5× input, 1.5× output

Writing DNA

Style Comparison

Similarity

44%

Claude Sonnet 5 uses 11.3x more emoji

Claude Sonnet 5

xAI: Grok 4

59%Vocabulary53%

35wSentence Length18w

0.53Hedging0.67

3.5Bold2.7

3.5Lists2.7

0.79Emoji0.07

1.25Headings0.86

0.06Transitions0.04

Based on 27 + 21 text responses

Research

What we learned reading every model

Claude Sonnet 5 and xAI: Grok 4 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

xAI: Grok 4 vs MiniMax M3New provider

xAI: Grok 4 vs Claude Sonnet 4Cross-provider

xAI: Grok 4 vs Pony AlphaNew provider