GPT-5 vs OpenAI: GPT-5.6 Terra
Compare GPT-5 and OpenAI: GPT-5.6 Terra, both from OpenAI, context windows of 400K vs 1.1M, tested across 51 shared challenges.
Our Verdict
GPT-5
OpenAI: GPT-5.6 Terra
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Too close to call
API pricing
Cost per 1M tokens
GPT-5
Input
$1.25
2.0× cheaper
Output
$10.00
1.5× cheaper
OpenAI: GPT-5.6 Terra
Input
$2.50
Output
$15.00
GPT-5 is cheaper on both — 2.0× input, 1.5× output
Writing DNA
Style Comparison
Similarity
61%
OpenAI: GPT-5.6 Terra uses 14.6x more bold
GPT-5
OpenAI: GPT-5.6 Terra
65%Vocabulary57%
13wSentence Length18w
0.20Hedging0.85
0.2Bold2.8
4.6Lists4.6
0.00Emoji0.00
0.16Headings1.12
0.03Transitions0.06
Based on 16 + 27 text responses
Research
What we learned reading every model
FAQ
