xAI: Grok 4.3 vs OpenAI o4 Mini High
Compare xAI: Grok 4.3 by xAI against OpenAI o4 Mini High by OpenAI, context windows of 1.0M vs 200K, tested across 53 shared challenges.
Our Verdict
xAI: Grok 4.3
OpenAI o4 Mini HighRunner-up
No community votes yet. On paper, xAI: Grok 4.3 has the edge — bigger model tier, newer, bigger context window.
Slight edge
API pricing
Cost per 1M tokens
xAI: Grok 4.3
Input
$1.25
Output
$2.50
1.8× cheaper
OpenAI o4 Mini High
Input
$1.10
1.1× cheaper
Output
$4.40
OpenAI o4 Mini High wins input (1.1× cheaper)·xAI: Grok 4.3 wins output (1.8× cheaper)
Writing DNA
Style Comparison
Similarity
74%
xAI: Grok 4.3 uses 225.5x more bold
xAI: Grok 4.3
OpenAI o4 Mini High
62%Vocabulary70%
16wSentence Length18w
0.46Hedging0.33
2.3Bold0.0
2.5Lists1.3
0.00Emoji0.02
0.34Headings0.00
0.14Transitions0.04
Based on 27 + 14 text responses
Research
What we learned reading every model
FAQ
