xAI: Grok 4.3 vs OpenAI o4-mini
Compare xAI: Grok 4.3 by xAI against OpenAI o4-mini by OpenAI, tested across 53 shared challenges. Updated May 2026.
Which is better, xAI: Grok 4.3 or OpenAI o4-mini?
xAI: Grok 4.3 and OpenAI o4-mini are both competitive models. xAI: Grok 4.3 costs $1.25/M input tokens vs $1.1/M for OpenAI o4-mini. Compare their real outputs side by side below.
Key Differences Between xAI: Grok 4.3 and OpenAI o4-mini
xAI: Grok 4.3 is made by xai while OpenAI o4-mini is from openai. On pricing, xAI: Grok 4.3 costs $1.25/M input tokens vs $1.1/M for OpenAI o4-mini.
API pricing
Per 1M tokens
xAI: Grok 4.3
Input
$1.25
Output
$2.50
1.8× cheaper
OpenAI o4-mini
Input
$1.10
1.1× cheaper
Output
$4.40
OpenAI o4-mini wins input (1.1× cheaper)·xAI: Grok 4.3 wins output (1.8× cheaper)
Our Verdict
xAI: Grok 4.3
OpenAI o4-miniRunner-up
No community votes yet. On paper, xAI: Grok 4.3 has the edge — bigger model tier, newer, bigger context window.
Too close to call
Writing DNA
Style Comparison
Similarity
82%
xAI: Grok 4.3 uses 225.5x more bold
xAI: Grok 4.3
OpenAI o4-mini
62%Vocabulary73%
16wSentence Length15w
0.46Hedging0.18
2.3Bold0.0
2.5Lists2.1
0.00Emoji0.00
0.34Headings0.00
0.14Transitions0.02
Based on 27 + 10 text responses
FAQ
