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

Claude 3 Opus is developed by Anthropic while Grok 3 is developed by xAI. Claude 3 Opus has a 200K token context window vs Grok 3's 128K. You can compare their actual outputs across 11 challenges on Rival to see how they differ in practice.

Which is better, Claude 3 Opus or Grok 3?

It depends on your use case. Claude 3 Opus and Grok 3 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 11 challenges so you can judge which fits your needs best.

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

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

Claude 3 Opus is developed by Anthropic while Grok 3 is developed by xAI. Claude 3 Opus has a 200K token context window vs Grok 3's 128K. You can compare their actual outputs across 11 challenges on Rival to see how they differ in practice.

Which is better, Claude 3 Opus or Grok 3?

It depends on your use case. Claude 3 Opus and Grok 3 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 11 challenges so you can judge which fits your needs best.

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

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

Updated Feb 2025

Our Verdict

Claude 3 Opus

Grok 3

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

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

51%

Grok 3 uses 246.4x more bold

Claude 3 Opus

Grok 3

54%Vocabulary49%

14wSentence Length18w

0.48Hedging0.94

0.0Bold2.5

3.0Lists3.0

0.00Emoji0.04

0.00Headings0.65

0.06Transitions0.08

Based on 3 + 17 text responses

Research

What we learned reading every model

Claude 3 Opus and Grok 3 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

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

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

51%

Grok 3 uses 246.4x more bold

Claude 3 Opus

Grok 3

54%Vocabulary49%

14wSentence Length18w

0.48Hedging0.94

0.0Bold2.5

3.0Lists3.0

0.00Emoji0.04

0.00Headings0.65

0.06Transitions0.08

Based on 3 + 17 text responses

Research

What we learned reading every model

Claude 3 Opus and Grok 3 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