What is the difference between Claude Opus 4 and Grok 4.20 Beta?

Claude Opus 4 is developed by Anthropic while Grok 4.20 Beta is developed by xAI. Claude Opus 4 has a 200K token context window vs Grok 4.20 Beta's 2.0M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4 or Grok 4.20 Beta?

It depends on your use case. Claude Opus 4 and Grok 4.20 Beta 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 Opus 4 cost compared to Grok 4.20 Beta?

Claude Opus 4 costs $15/M input tokens and Grok 4.20 Beta costs $2/M input tokens. Grok 4.20 Beta is $13.00/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 Opus 4 and Grok 4.20 Beta on Rival?

This page shows a side-by-side comparison of Claude Opus 4 and Grok 4.20 Beta 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 4.20 Beta?

Claude Opus 4 is developed by Anthropic while Grok 4.20 Beta is developed by xAI. Claude Opus 4 has a 200K token context window vs Grok 4.20 Beta's 2.0M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4 or Grok 4.20 Beta?

It depends on your use case. Claude Opus 4 and Grok 4.20 Beta 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 Opus 4 cost compared to Grok 4.20 Beta?

Claude Opus 4 costs $15/M input tokens and Grok 4.20 Beta costs $2/M input tokens. Grok 4.20 Beta is $13.00/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 Opus 4 and Grok 4.20 Beta on Rival?

This page shows a side-by-side comparison of Claude Opus 4 and Grok 4.20 Beta 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 4.20 Beta: Which Is Better?

Updated Mar 2026

Our Verdict

Grok 4.20 Beta

Claude Opus 4Runner-up

No community votes yet. On paper, Grok 4.20 Beta has the edge — newer, bigger context window.

Grok 4.20 Beta is 13x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Claude Opus 4

Input

$15.00

Output

$75.00

Grok 4.20 Beta

Input

$2.00

7.5× cheaper

Output

$6.00

13× cheaper

Grok 4.20 Beta is cheaper on both — 7.5× input, 13× output

Writing DNA

Style Comparison

Similarity

27%

Claude Opus 4 uses 11.2x more emoji

Claude Opus 4

Grok 4.20 Beta

64%Vocabulary57%

62wSentence Length20w

0.52Hedging0.35

4.4Bold4.2

9.1Lists3.7

0.11Emoji0.00

1.87Headings0.62

0.27Transitions0.14

Based on 16 + 23 text responses

Research

What we learned reading every model

Claude Opus 4 and Grok 4.20 Beta 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 Opus 4 vs GPT-5New provider

Claude Opus 4 vs MiniMax M3New provider

Claude Opus 4 vs Gemini 2.5 Pro Preview 06-05New provider

Updated Mar 2026

Our Verdict

Grok 4.20 Beta

Claude Opus 4Runner-up

No community votes yet. On paper, Grok 4.20 Beta has the edge — newer, bigger context window.

Grok 4.20 Beta is 13x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Claude Opus 4

Input

$15.00

Output

$75.00

Grok 4.20 Beta

Input

$2.00

7.5× cheaper

Output

$6.00

13× cheaper

Grok 4.20 Beta is cheaper on both — 7.5× input, 13× output

Writing DNA

Style Comparison

Similarity

27%

Claude Opus 4 uses 11.2x more emoji

Claude Opus 4

Grok 4.20 Beta

64%Vocabulary57%

62wSentence Length20w

0.52Hedging0.35

4.4Bold4.2

9.1Lists3.7

0.11Emoji0.00

1.87Headings0.62

0.27Transitions0.14

Based on 16 + 23 text responses

Research

What we learned reading every model

Claude Opus 4 and Grok 4.20 Beta 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 Opus 4 vs GPT-5New provider

Claude Opus 4 vs MiniMax M3New provider

Claude Opus 4 vs Gemini 2.5 Pro Preview 06-05New provider