What is the difference between Claude Sonnet 4.5 and Grok 4.5?

Claude Sonnet 4.5 is developed by Anthropic while Grok 4.5 is developed by xAI. Claude Sonnet 4.5 has a 200K token context window vs Grok 4.5's 500K. You can compare their actual outputs across 42 challenges on Rival to see how they differ in practice.

Which is better, Claude Sonnet 4.5 or Grok 4.5?

It depends on your use case. Claude Sonnet 4.5 and Grok 4.5 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 much does Claude Sonnet 4.5 cost compared to Grok 4.5?

Claude Sonnet 4.5 costs $3/M input tokens and Grok 4.5 costs $2/M input tokens. Grok 4.5 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 4.5 and Grok 4.5 on Rival?

This page shows a side-by-side comparison of Claude Sonnet 4.5 and Grok 4.5 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 4.5 and Grok 4.5?

Claude Sonnet 4.5 is developed by Anthropic while Grok 4.5 is developed by xAI. Claude Sonnet 4.5 has a 200K token context window vs Grok 4.5's 500K. You can compare their actual outputs across 42 challenges on Rival to see how they differ in practice.

Which is better, Claude Sonnet 4.5 or Grok 4.5?

It depends on your use case. Claude Sonnet 4.5 and Grok 4.5 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 much does Claude Sonnet 4.5 cost compared to Grok 4.5?

Claude Sonnet 4.5 costs $3/M input tokens and Grok 4.5 costs $2/M input tokens. Grok 4.5 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 4.5 and Grok 4.5 on Rival?

This page shows a side-by-side comparison of Claude Sonnet 4.5 and Grok 4.5 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 4.5 vs Grok 4.5: Which Is Better?

Updated Jul 2026

Our Verdict

Grok 4.5

Claude Sonnet 4.5Runner-up

No community votes yet. On paper, Grok 4.5 has the edge — newer, bigger context window.

Too close to call

What do Claude Sonnet 4.5 and Grok 4.5 say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

Claude Sonnet 4.5

Input

$3.00

Output

$15.00

Grok 4.5

Input

$2.00

1.5× cheaper

Output

$6.00

2.5× cheaper

Grok 4.5 is cheaper on both — 1.5× input, 2.5× output

Writing DNA

Style Comparison

Similarity

40%

Claude Sonnet 4.5 uses 5.8x more sentence length

Claude Sonnet 4.5

Grok 4.5

64%Vocabulary61%

94wSentence Length16w

0.48Hedging0.23

4.9Bold2.5

8.0Lists2.4

0.45Emoji0.09

1.91Headings0.48

0.07Transitions0.06

Based on 20 + 27 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Claude Sonnet 4.5 vs MiniMax M3New provider

Claude Sonnet 4.5 vs Ox AlphaNew provider

Claude Sonnet 4.5 vs Gemini 2.5 Pro Preview 06-05New provider

Updated Jul 2026

Our Verdict

Grok 4.5

Claude Sonnet 4.5Runner-up

No community votes yet. On paper, Grok 4.5 has the edge — newer, bigger context window.

Too close to call

What do Claude Sonnet 4.5 and Grok 4.5 say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

Claude Sonnet 4.5

Input

$3.00

Output

$15.00

Grok 4.5

Input

$2.00

1.5× cheaper

Output

$6.00

2.5× cheaper

Grok 4.5 is cheaper on both — 1.5× input, 2.5× output

Writing DNA

Style Comparison

Similarity

40%

Claude Sonnet 4.5 uses 5.8x more sentence length

Claude Sonnet 4.5

Grok 4.5

64%Vocabulary61%

94wSentence Length16w

0.48Hedging0.23

4.9Bold2.5

8.0Lists2.4

0.45Emoji0.09

1.91Headings0.48

0.07Transitions0.06

Based on 20 + 27 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Claude Sonnet 4.5 vs MiniMax M3New provider

Claude Sonnet 4.5 vs Ox AlphaNew provider

Claude Sonnet 4.5 vs Gemini 2.5 Pro Preview 06-05New provider