Grok Code Fast 1 vs OpenAI o3
Compare Grok Code Fast 1 by xAI against OpenAI o3 by OpenAI, tested across 54 shared challenges.
Our Verdict
Grok Code Fast 1
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 Code Fast 1 is 27x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Grok Code Fast 1
Input
$0.20
50× cheaper
Output
$1.50
27× cheaper
OpenAI o3
Input
$10.00
Output
$40.00
Grok Code Fast 1 is cheaper on both — 50× input, 27× output
Writing DNA
Style Comparison
Similarity
56%
Grok Code Fast 1 uses 6.0x more emoji
Grok Code Fast 1
OpenAI o3
60%Vocabulary68%
17wSentence Length14w
0.97Hedging0.26
2.8Bold0.7
2.5Lists3.0
0.06Emoji0.00
0.89Headings0.38
0.11Transitions0.12
Based on 23 + 16 text responses
Research
What we learned reading every model
FAQ
