xAI: Grok 4 vs OpenAI o4-mini
Compare xAI: Grok 4 by xAI against OpenAI o4-mini by OpenAI, tested across 53 shared challenges. Updated May 2026.
Which is better, xAI: Grok 4 or OpenAI o4-mini?
xAI: Grok 4 and OpenAI o4-mini are both competitive models. xAI: Grok 4 costs $3/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 and OpenAI o4-mini
xAI: Grok 4 is made by xai while OpenAI o4-mini is from openai. On pricing, xAI: Grok 4 costs $3/M input tokens vs $1.1/M for OpenAI o4-mini.
API pricing
Per 1M tokens
xAI: Grok 4
Input
$3.00
Output
$15.00
OpenAI o4-mini
Input
$1.10
2.7× cheaper
Output
$4.40
3.4× cheaper
OpenAI o4-mini is cheaper on both — 2.7× input, 3.4× output
Our Verdict
xAI: Grok 4
OpenAI o4-miniRunner-up
No community votes yet. On paper, xAI: Grok 4 has the edge — bigger model tier, newer, bigger context window.
OpenAI o4-mini is 3.4x cheaper per token — worth considering if cost matters.
Too close to call
Writing DNA
Style Comparison
Similarity
43%
xAI: Grok 4 uses 267.9x more bold
xAI: Grok 4
OpenAI o4-mini
53%Vocabulary73%
18wSentence Length15w
0.67Hedging0.18
2.7Bold0.0
2.7Lists2.1
0.07Emoji0.00
0.86Headings0.00
0.04Transitions0.02
Based on 21 + 10 text responses
FAQ
