Grok 4.20 Beta vs OpenAI o4-mini
Compare Grok 4.20 Beta by xAI against OpenAI o4-mini by OpenAI, tested across 53 shared challenges.
Our Verdict
Grok 4.20 Beta
OpenAI o4-miniRunner-up
No community votes yet. On paper, Grok 4.20 Beta has the edge — bigger model tier, newer, bigger context window.
Too close to call
API pricing
Cost per 1M tokens
Grok 4.20 Beta
Input
$2.00
Output
$6.00
OpenAI o4-mini
Input
$1.10
1.8× cheaper
Output
$4.40
1.4× cheaper
OpenAI o4-mini is cheaper on both — 1.8× input, 1.4× output
Writing DNA
Style Comparison
Similarity
55%
Grok 4.20 Beta uses 417.7x more bold
Grok 4.20 Beta
OpenAI o4-mini
57%Vocabulary73%
20wSentence Length15w
0.35Hedging0.18
4.2Bold0.0
3.7Lists2.1
0.00Emoji0.00
0.62Headings0.00
0.14Transitions0.02
Based on 23 + 10 text responses
Research
What we learned reading every model
FAQ
