OpenAI: GPT-5.6 Terra vs Sonoma Dusk Alpha
Compare OpenAI: GPT-5.6 Terra by OpenAI against Sonoma Dusk Alpha by OpenRouter, context windows of 1.1M vs 2.0M, tested across 34 shared challenges.
Our Verdict
OpenAI: GPT-5.6 Terra
Sonoma Dusk Alpha
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
OpenAI: GPT-5.6 Terra
Input
$2.50
Output
$15.00
Sonoma Dusk Alpha
Input
$0.000
Output
$0.000
Writing DNA
Style Comparison
Similarity
66%
Sonoma Dusk Alpha uses 5.9x more transitions
OpenAI: GPT-5.6 Terra
Sonoma Dusk Alpha
57%Vocabulary65%
18wSentence Length15w
0.85Hedging0.54
2.8Bold1.2
4.6Lists2.1
0.00Emoji0.00
1.12Headings1.44
0.06Transitions0.33
Based on 27 + 14 text responses
Research
What we learned reading every model
FAQ
