Gemini 2.5 Flash Preview 05-20 (thinking) vs Grok 4.20 Beta
Compare Gemini 2.5 Flash Preview 05-20 (thinking) by Google AI against Grok 4.20 Beta by xAI, context windows of 1.0M vs 2.0M, tested across 11 shared challenges.
Our Verdict
Grok 4.20 Beta
Gemini 2.5 Flash Preview 05-20 (thinking)Runner-up
No community votes yet. On paper, Grok 4.20 Beta has the edge — bigger model tier, newer, bigger context window.
Slight edge
API pricing
Cost per 1M tokens
Gemini 2.5 Flash Preview 05-20 (thinking)
Input
$0.15
13× cheaper
Output
$3.50
1.7× cheaper
Grok 4.20 Beta
Input
$2.00
Output
$6.00
Gemini 2.5 Flash Preview 05-20 (thinking) is cheaper on both — 13× input, 1.7× output
Writing DNA
Style Comparison
Similarity
43%
Grok 4.20 Beta uses 35.4x more hedging
Gemini 2.5 Flash Preview 05-20 (thinking)
Grok 4.20 Beta
70%Vocabulary57%
11wSentence Length20w
0.00Hedging0.35
4.2Bold4.2
7.3Lists3.7
0.00Emoji0.00
0.00Headings0.62
0.00Transitions0.14
Based on 3 + 23 text responses
Research
What we learned reading every model
FAQ
