GPT-5.5 vs Grok 3 Beta
Compare GPT-5.5 by OpenAI against Grok 3 Beta by xAI, context windows of 1.1M vs 131K, tested across 53 shared challenges.
Our Verdict
GPT-5.5
Grok 3 BetaRunner-up
No community votes yet. On paper, GPT-5.5 has the edge — newer, bigger context window.
Grok 3 Beta is 7.5x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-5.5
Input
$5.00
Output
$30.00
Grok 3 Beta
Input
$2.00
2.5× cheaper
Output
$4.00
7.5× cheaper
Grok 3 Beta is cheaper on both — 2.5× input, 7.5× output
Writing DNA
Style Comparison
Similarity
47%
Grok 3 Beta uses 8.2x more transitions
GPT-5.5
Grok 3 Beta
58%Vocabulary48%
18wSentence Length19w
0.74Hedging0.67
2.9Bold3.1
5.1Lists5.5
0.00Emoji0.00
1.68Headings0.52
0.03Transitions0.28
Based on 26 + 23 text responses
Research
What we learned reading every model
FAQ
