Grok 3 Thinking vs Grok 4.20 Beta
Compare Grok 3 Thinking and Grok 4.20 Beta, both from xAI, context windows of 128K vs 2.0M, tested across 13 shared challenges. Updated April 2026.
Which is better, Grok 3 Thinking or Grok 4.20 Beta?
Grok 3 Thinking and Grok 4.20 Beta are both competitive models. Context windows: 128K vs 2000K tokens. Compare their real outputs side by side below.
Key Differences Between Grok 3 Thinking and Grok 4.20 Beta
Grok 3 Thinking is made by xai while Grok 4.20 Beta is from xai. Grok 3 Thinking has a 128K token context window compared to Grok 4.20 Beta's 2000K.
API pricing
Per 1M tokens
Grok 3 Thinking
Input
—
Output
—
Grok 4.20 Beta
Input
$2.00
Output
$6.00
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
Writing DNA
Style Comparison
Similarity
52%
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
FAQ
