OpenAI: GPT-5.6 Terra vs Grok 3 Beta
Compare OpenAI: GPT-5.6 Terra by OpenAI against Grok 3 Beta by xAI, context windows of 1.1M vs 131K, tested across 53 shared challenges.
Our Verdict
OpenAI: GPT-5.6 Terra
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 3.8x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
OpenAI: GPT-5.6 Terra
Input
$2.50
Output
$15.00
Grok 3 Beta
Input
$2.00
1.3× cheaper
Output
$4.00
3.8× cheaper
Grok 3 Beta is cheaper on both — 1.3× input, 3.8× output
Writing DNA
Style Comparison
Similarity
61%
Grok 3 Beta uses 5.0x more transitions
OpenAI: GPT-5.6 Terra
Grok 3 Beta
57%Vocabulary48%
18wSentence Length19w
0.85Hedging0.67
2.8Bold3.1
4.6Lists5.5
0.00Emoji0.00
1.12Headings0.52
0.06Transitions0.28
Based on 27 + 23 text responses
Research
What we learned reading every model
FAQ
