What is the difference between Grok 3 Thinking and Grok 4.20 Beta?

Both are developed by xAI but target different use cases. Grok 3 Thinking has a 128K token context window vs Grok 4.20 Beta's 2.0M. You can compare their actual outputs across 13 challenges on Rival to see how they differ in practice.

Which is better, Grok 3 Thinking or Grok 4.20 Beta?

It depends on your use case. Grok 3 Thinking and Grok 4.20 Beta 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 Grok 3 Thinking and Grok 4.20 Beta on Rival?

This page shows a side-by-side comparison of Grok 3 Thinking 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 Grok 3 Thinking and Grok 4.20 Beta?

Both are developed by xAI but target different use cases. Grok 3 Thinking has a 128K token context window vs Grok 4.20 Beta's 2.0M. You can compare their actual outputs across 13 challenges on Rival to see how they differ in practice.

Which is better, Grok 3 Thinking or Grok 4.20 Beta?

It depends on your use case. Grok 3 Thinking and Grok 4.20 Beta 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 Grok 3 Thinking and Grok 4.20 Beta on Rival?

This page shows a side-by-side comparison of Grok 3 Thinking 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.

Grok 3 Thinking vs Grok 4.20 Beta: Which Is Better?

Updated Mar 2026

Our Verdict

Grok 4.20 Beta

Grok 3 ThinkingRunner-up

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

Too close to call

API pricing

Cost per 1M tokens

Grok 3 Thinking

Input

—

Output

—

Grok 4.20 Beta

Input

$2.00

Output

$6.00

Writing DNA

Style Comparison

Similarity

53%

Grok 3 Thinking uses 3.1x more hedging

Grok 3 Thinking

Grok 4.20 Beta

46%Vocabulary57%

19wSentence Length20w

1.11Hedging0.35

3.3Bold4.2

2.6Lists3.7

0.00Emoji0.00

0.64Headings0.62

0.25Transitions0.14

Based on 6 + 23 text responses

Research

What we learned reading every model

Grok 3 Thinking 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

Grok 3 Thinking vs MiniMax M3New provider

Grok 3 Thinking vs GPT-5New provider

Grok 3 Thinking vs Claude Opus 4New provider

Updated Mar 2026

Our Verdict

Grok 4.20 Beta

Grok 3 ThinkingRunner-up

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

Too close to call

API pricing

Cost per 1M tokens

Grok 3 Thinking

Input

—

Output

—

Grok 4.20 Beta

Input

$2.00

Output

$6.00

Writing DNA

Style Comparison

Similarity

53%

Grok 3 Thinking uses 3.1x more hedging

Grok 3 Thinking

Grok 4.20 Beta

46%Vocabulary57%

19wSentence Length20w

1.11Hedging0.35

3.3Bold4.2

2.6Lists3.7

0.00Emoji0.00

0.64Headings0.62

0.25Transitions0.14

Based on 6 + 23 text responses

Research

What we learned reading every model

Grok 3 Thinking 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

Grok 3 Thinking vs MiniMax M3New provider

Grok 3 Thinking vs GPT-5New provider

Grok 3 Thinking vs Claude Opus 4New provider