o3 Mini vs Grok 3
Compare o3 Mini by OpenAI against Grok 3 by xAI, context windows of 64K vs 128K, tested across 53 shared challenges. Updated April 2026.
Which is better, o3 Mini or Grok 3?
o3 Mini and Grok 3 are both competitive models. Context windows: 64K vs 128K tokens. Compare their real outputs side by side below.
Key Differences Between o3 Mini and Grok 3
o3 Mini is made by openai while Grok 3 is from xai. o3 Mini has a 64K token context window compared to Grok 3's 128K.
No community votes yet. On paper, Grok 3 has the edge — bigger model tier, newer, bigger context window.
Style Comparison
Grok 3 uses 3.9x more emoji
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