o3 Mini
Nothing here. The model returned empty. We stared at it for a while.
o3 Mini vs xAI: Grok 4
Compare o3 Mini by OpenAI against xAI: Grok 4 by xAI, context windows of 64K vs 256K, tested across 38 shared challenges. Updated April 2026.
Which is better, o3 Mini or xAI: Grok 4?
o3 Mini and xAI: Grok 4 are both competitive models. o3 Mini costs $1.1/M input tokens vs $3/M for xAI: Grok 4. Context windows: 64K vs 256K tokens. Compare their real outputs side by side below.
Key Differences Between o3 Mini and xAI: Grok 4
o3 Mini is made by openai while xAI: Grok 4 is from xai. o3 Mini has a 64K token context window compared to xAI: Grok 4's 256K. On pricing, o3 Mini costs $1.1/M input tokens vs $3/M for xAI: Grok 4.
Our Verdict
xAI: Grok 4
o3 MiniRunner-up
No community votes yet. On paper, xAI: Grok 4 has the edge — bigger model tier, newer, bigger context window.
o3 Mini is 3.4x cheaper per token — worth considering if cost matters.
Slight edge
Writing DNA
Style Comparison
Similarity
96%
xAI: Grok 4 uses 7.0x more emoji
o3 Mini
xAI: Grok 4
65%Vocabulary53%
17wSentence Length18w
0.74Hedging0.67
3.9Bold2.7
1.7Lists2.7
0.00Emoji0.07
0.47Headings0.86
0.38Transitions0.04
Based on 12 + 21 text responses
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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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