What is the difference between Claude Opus 4 and Grok 3 Thinking?

Claude Opus 4 is developed by Anthropic while Grok 3 Thinking is developed by xAI. Claude Opus 4 has a 200K token context window vs Grok 3 Thinking's 128K. You can compare their actual outputs across 13 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4 or Grok 3 Thinking?

It depends on your use case. Claude Opus 4 and Grok 3 Thinking each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 13 challenges so you can judge which fits your needs best.

How can I compare Claude Opus 4 and Grok 3 Thinking on Rival?

This page shows a side-by-side comparison of Claude Opus 4 and Grok 3 Thinking 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 and Grok 3 Thinking?

Claude Opus 4 is developed by Anthropic while Grok 3 Thinking is developed by xAI. Claude Opus 4 has a 200K token context window vs Grok 3 Thinking's 128K. You can compare their actual outputs across 13 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4 or Grok 3 Thinking?

It depends on your use case. Claude Opus 4 and Grok 3 Thinking each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 13 challenges so you can judge which fits your needs best.

How can I compare Claude Opus 4 and Grok 3 Thinking on Rival?

This page shows a side-by-side comparison of Claude Opus 4 and Grok 3 Thinking 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 vs Grok 3 Thinking: Which Is Better?

Updated May 2025

Our Verdict

Claude Opus 4

Grok 3 ThinkingRunner-up

No community votes yet. On paper, Claude Opus 4 has the edge — newer, bigger context window.

Too close to call

API pricing

Cost per 1M tokens

Claude Opus 4

Input

$15.00

Output

$75.00

Grok 3 Thinking

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

42%

Claude Opus 4 uses 11.2x more emoji

Claude Opus 4

Grok 3 Thinking

64%Vocabulary46%

62wSentence Length19w

0.52Hedging1.11

4.4Bold3.3

9.1Lists2.6

0.11Emoji0.00

1.87Headings0.64

0.27Transitions0.25

Based on 16 + 6 text responses

Research

What we learned reading every model

Claude Opus 4 and Grok 3 Thinking 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

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Grok 3 Thinking vs Gemini 2.5 Pro Preview 06-05New provider

Updated May 2025

Our Verdict

Claude Opus 4

Grok 3 ThinkingRunner-up

No community votes yet. On paper, Claude Opus 4 has the edge — newer, bigger context window.

Too close to call

API pricing

Cost per 1M tokens

Claude Opus 4

Input

$15.00

Output

$75.00

Grok 3 Thinking

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

42%

Claude Opus 4 uses 11.2x more emoji

Claude Opus 4

Grok 3 Thinking

64%Vocabulary46%

62wSentence Length19w

0.52Hedging1.11

4.4Bold3.3

9.1Lists2.6

0.11Emoji0.00

1.87Headings0.64

0.27Transitions0.25

Based on 16 + 6 text responses

Research

What we learned reading every model

Claude Opus 4 and Grok 3 Thinking 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

Grok 3 Thinking vs MiniMax M1New provider

Grok 3 Thinking vs GPT-5New provider

Grok 3 Thinking vs Gemini 2.5 Pro Preview 06-05New provider