Grok 3
Nothing here. The model returned empty. We stared at it for a while.
Grok 3 vs OpenAI o3
Compare Grok 3 by xAI against OpenAI o3 by OpenAI, tested across 53 shared challenges. Updated April 2026.
Which is better, Grok 3 or OpenAI o3?
Grok 3 and OpenAI o3 are both competitive models. Compare their real outputs side by side below.
Key Differences Between Grok 3 and OpenAI o3
Grok 3 is made by xai while OpenAI o3 is from openai.
Our Verdict
Grok 3
OpenAI o3
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
Grok 3
OpenAI o3
49%Vocabulary68%
18wSentence Length14w
0.94Hedging0.26
2.5Bold0.7
3.0Lists3.0
0.04Emoji0.00
0.65Headings0.38
0.08Transitions0.12
Based on 17 + 16 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.
Free preview13 of 58 slides
FAQ