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

Claude 3 Opus is developed by Anthropic while Grok 3 Thinking is developed by xAI. Claude 3 Opus has a 200K token context window vs Grok 3 Thinking's 128K. You can compare their actual outputs across 7 challenges on Rival to see how they differ in practice.

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

It depends on your use case. Claude 3 Opus and Grok 3 Thinking each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 7 challenges so you can judge which fits your needs best.

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

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

Claude 3 Opus is developed by Anthropic while Grok 3 Thinking is developed by xAI. Claude 3 Opus has a 200K token context window vs Grok 3 Thinking's 128K. You can compare their actual outputs across 7 challenges on Rival to see how they differ in practice.

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

It depends on your use case. Claude 3 Opus and Grok 3 Thinking each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 7 challenges so you can judge which fits your needs best.

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

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

Updated Feb 2025

Our Verdict

Claude 3 Opus

Grok 3 Thinking

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call

API pricing

Cost per 1M tokens

Claude 3 Opus

Input

$15.00

Output

$75.00

Grok 3 Thinking

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

59%

Grok 3 Thinking uses 334.3x more bold

Claude 3 Opus

Grok 3 Thinking

54%Vocabulary46%

14wSentence Length19w

0.48Hedging1.11

0.0Bold3.3

3.0Lists2.6

0.00Emoji0.00

0.00Headings0.64

0.06Transitions0.25

Based on 3 + 6 text responses

Research

What we learned reading every model

Claude 3 Opus 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

Claude 3 Opus vs Llama 4 MaverickNew provider

Claude 3 Opus vs GPT-5New provider

Claude 3 Opus vs MiniMax M3New provider

Updated Feb 2025

Our Verdict

Claude 3 Opus

Grok 3 Thinking

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call

API pricing

Cost per 1M tokens

Claude 3 Opus

Input

$15.00

Output

$75.00

Grok 3 Thinking

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

59%

Grok 3 Thinking uses 334.3x more bold

Claude 3 Opus

Grok 3 Thinking

54%Vocabulary46%

14wSentence Length19w

0.48Hedging1.11

0.0Bold3.3

3.0Lists2.6

0.00Emoji0.00

0.00Headings0.64

0.06Transitions0.25

Based on 3 + 6 text responses

Research

What we learned reading every model

Claude 3 Opus 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

Claude 3 Opus vs Llama 4 MaverickNew provider

Claude 3 Opus vs GPT-5New provider

Claude 3 Opus vs MiniMax M3New provider