OpenAI: GPT-5.6 Terra vs Optimus Alpha
Compare OpenAI: GPT-5.6 Terra by OpenAI against Optimus Alpha by OpenRouter, context windows of 1.1M vs 1.0M, tested across 17 shared challenges.
Our Verdict
OpenAI: GPT-5.6 Terra
Optimus AlphaRunner-up
No community votes yet. On paper, OpenAI: GPT-5.6 Terra has the edge — newer, major provider backing.
Too close to call
API pricing
Cost per 1M tokens
OpenAI: GPT-5.6 Terra
Input
$2.50
Output
$15.00
Optimus Alpha
Input
—
Output
—
Writing DNA
Style Comparison
Similarity
50%
Optimus Alpha uses 4.9x more transitions
OpenAI: GPT-5.6 Terra
Optimus Alpha
57%Vocabulary63%
18wSentence Length18w
0.85Hedging0.55
2.8Bold7.7
4.6Lists5.7
0.00Emoji0.00
1.12Headings0.30
0.06Transitions0.27
Based on 27 + 10 text responses
Research
What we learned reading every model
FAQ
