Grok 3 Beta vs OpenAI o3
Compare Grok 3 Beta by xAI against OpenAI o3 by OpenAI, tested across 54 shared challenges. Updated May 2026.
Which is better, Grok 3 Beta or OpenAI o3?
Grok 3 Beta and OpenAI o3 are both competitive models. Grok 3 Beta costs $2/M input tokens vs $10/M for OpenAI o3. Compare their real outputs side by side below.
Key Differences Between Grok 3 Beta and OpenAI o3
Grok 3 Beta is made by xai while OpenAI o3 is from openai. On pricing, Grok 3 Beta costs $2/M input tokens vs $10/M for OpenAI o3.
API pricing
Per 1M tokens
Grok 3 Beta
Input
$2.00
5.0× cheaper
Output
$4.00
10× cheaper
OpenAI o3
Input
$10.00
Output
$40.00
Grok 3 Beta is cheaper on both — 5.0× input, 10× output
Our Verdict
Grok 3 Beta
OpenAI o3
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Grok 3 Beta is 10x cheaper per token — worth considering if cost matters.
Too close to call
Writing DNA
Style Comparison
Similarity
36%
Grok 3 Beta uses 4.4x more bold
Grok 3 Beta
OpenAI o3
48%Vocabulary68%
19wSentence Length14w
0.67Hedging0.26
3.1Bold0.7
5.5Lists3.0
0.00Emoji0.00
0.52Headings0.38
0.28Transitions0.12
Based on 23 + 16 text responses
FAQ
