GPT-5.3 Chat vs Grok 3 Beta
Compare GPT-5.3 Chat by OpenAI against Grok 3 Beta by xAI, context windows of 128K vs 131K, tested across 53 shared challenges.
Our Verdict
GPT-5.3 Chat
Grok 3 Beta
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 3.5x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-5.3 Chat
Input
$1.75
1.1× cheaper
Output
$14.00
Grok 3 Beta
Input
$2.00
Output
$4.00
3.5× cheaper
GPT-5.3 Chat wins input (1.1× cheaper)·Grok 3 Beta wins output (3.5× cheaper)
Writing DNA
Style Comparison
Similarity
58%
Grok 3 Beta uses 52.1x more headings
GPT-5.3 Chat
Grok 3 Beta
59%Vocabulary48%
26wSentence Length19w
0.84Hedging0.67
1.7Bold3.1
6.6Lists5.5
0.00Emoji0.00
0.00Headings0.52
0.25Transitions0.28
Based on 23 + 23 text responses
Research
What we learned reading every model
FAQ
