GPT-5.4 Nano vs GPT-5.6 Terra
Compare GPT-5.4 Nano and GPT-5.6 Terra, both from OpenAI, context windows of 400K vs 1.1M, tested across 53 shared challenges.
Our Verdict
GPT-5.6 Terra
GPT-5.4 NanoRunner-up
No community votes yet. On paper, GPT-5.6 Terra has the edge — bigger model tier, newer, bigger context window.
GPT-5.4 Nano is 12x cheaper per token — worth considering if cost matters.
Slight edge
API pricing
Cost per 1M tokens
GPT-5.4 Nano
Input
$0.20
13× cheaper
Output
$1.25
12× cheaper
GPT-5.6 Terra
Input
$2.50
Output
$15.00
GPT-5.4 Nano is cheaper on both — 13× input, 12× output
Writing DNA
Style Comparison
Similarity
57%
GPT-5.4 Nano
GPT-5.6 Terra
51%Vocabulary57%
21wSentence Length18w
0.58Hedging0.85
7.1Bold2.8
5.5Lists4.6
0.01Emoji0.00
1.39Headings1.12
0.05Transitions0.06
Based on 23 + 27 text responses
Research
What we learned reading every model
FAQ
