GPT-5.1-Codex vs Grok 3 Beta
Compare GPT-5.1-Codex by OpenAI against Grok 3 Beta by xAI, context windows of 400K vs 131K, tested across 53 shared challenges.
Our Verdict
GPT-5.1-Codex
Grok 3 BetaRunner-up
No community votes yet. On paper, GPT-5.1-Codex has the edge — newer, bigger context window.
Too close to call
API pricing
Cost per 1M tokens
GPT-5.1-Codex
Input
$1.25
1.6× cheaper
Output
$10.00
Grok 3 Beta
Input
$2.00
Output
$4.00
2.5× cheaper
GPT-5.1-Codex wins input (1.6× cheaper)·Grok 3 Beta wins output (2.5× cheaper)
Writing DNA
Style Comparison
Similarity
50%
Grok 3 Beta uses 1.7x more hedging
GPT-5.1-Codex
Grok 3 Beta
70%Vocabulary48%
17wSentence Length19w
0.39Hedging0.67
3.4Bold3.1
3.5Lists5.5
0.00Emoji0.00
0.50Headings0.52
0.38Transitions0.28
Based on 14 + 23 text responses
Research
What we learned reading every model
FAQ
