OpenAI o3
Nothing here. The model returned empty. We stared at it for a while.
OpenAI o3 vs Grok 3
Compare OpenAI o3 by OpenAI against Grok 3 by xAI, tested across 53 shared challenges. Updated April 2026.
Which is better, OpenAI o3 or Grok 3?
OpenAI o3 and Grok 3 are both competitive models. Compare their real outputs side by side below.
Key Differences Between OpenAI o3 and Grok 3
OpenAI o3 is made by openai while Grok 3 is from xai.
Our Verdict
OpenAI o3
Grok 3
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Too close to call
Writing DNA
Style Comparison
Similarity
96%
Grok 3 uses 3.9x more emoji
OpenAI o3
Grok 3
68%Vocabulary49%
14wSentence Length18w
0.26Hedging0.94
0.7Bold2.5
3.0Lists3.0
0.00Emoji0.04
0.38Headings0.65
0.12Transitions0.08
Based on 16 + 17 text responses
vsAsk them anything yourself
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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