Grok 3 Beta vs o3 Mini
Compare Grok 3 Beta by xAI against o3 Mini by OpenAI, context windows of 131K vs 64K, tested across 54 shared challenges. Updated June 2026.
Which is better, Grok 3 Beta or o3 Mini?
Grok 3 Beta and o3 Mini are both competitive models. Grok 3 Beta costs $2/M input tokens vs $1.1/M for o3 Mini. Context windows: 131K vs 64K tokens. Compare their real outputs side by side below.
Key Differences Between Grok 3 Beta and o3 Mini
Grok 3 Beta is made by xai while o3 Mini is from openai. Grok 3 Beta has a 131K token context window compared to o3 Mini's 64K. On pricing, Grok 3 Beta costs $2/M input tokens vs $1.1/M for o3 Mini.
API pricing
Per 1M tokens
Grok 3 Beta
Input
$2.00
Output
$4.00
1.1× cheaper
o3 Mini
Input
$1.10
1.8× cheaper
Output
$4.40
o3 Mini wins input (1.8× cheaper)·Grok 3 Beta wins output (1.1× cheaper)
Our Verdict
Grok 3 Beta
o3 MiniRunner-up
No community votes yet. On paper, Grok 3 Beta has the edge — bigger model tier, newer, bigger context window.
Slight edge
Writing DNA
Style Comparison
Similarity
64%
Grok 3 Beta uses 3.3x more lists
Grok 3 Beta
o3 Mini
48%Vocabulary65%
19wSentence Length17w
0.67Hedging0.74
3.1Bold3.9
5.5Lists1.7
0.00Emoji0.00
0.52Headings0.47
0.28Transitions0.38
Based on 23 + 12 text responses
FAQ
