OpenAI o4-mini
Nothing here. The model returned empty. We stared at it for a while.
OpenAI o4-mini vs xAI: Grok 4
Compare OpenAI o4-mini by OpenAI against xAI: Grok 4 by xAI, tested across 31 shared challenges. Updated April 2026.
Which is better, OpenAI o4-mini or xAI: Grok 4?
OpenAI o4-mini and xAI: Grok 4 are both competitive models. OpenAI o4-mini costs $1.1/M input tokens vs $3/M for xAI: Grok 4. Compare their real outputs side by side below.
Key Differences Between OpenAI o4-mini and xAI: Grok 4
OpenAI o4-mini is made by openai while xAI: Grok 4 is from xai. On pricing, OpenAI o4-mini costs $1.1/M input tokens vs $3/M for xAI: Grok 4.
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
94%
xAI: Grok 4 uses 267.9x more bold
OpenAI o4-mini
xAI: Grok 4
73%Vocabulary53%
15wSentence Length18w
0.18Hedging0.67
0.0Bold2.7
2.1Lists2.7
0.00Emoji0.07
0.00Headings0.86
0.02Transitions0.04
Based on 10 + 21 text responses
vs
Ask them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
Model Similarity Index
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
Devstral M / S
95.7%
Qwen3 Coder / Flash
95.6%
GPT-5.4 / Mini
93.3%
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
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