GPT-5.1 Codex Max vs OpenAI: GPT-5.6 Terra
Compare GPT-5.1 Codex Max and OpenAI: GPT-5.6 Terra, both from OpenAI, tested across 52 shared challenges.
Our Verdict
GPT-5.1 Codex Max
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-5.1 Codex Max
Input
—
Output
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OpenAI: GPT-5.6 Terra
Input
$2.50
Output
$15.00
Writing DNA
Style Comparison
Similarity
54%
OpenAI: GPT-5.6 Terra uses 9.1x more headings
GPT-5.1 Codex Max
OpenAI: GPT-5.6 Terra
60%Vocabulary57%
16wSentence Length18w
0.36Hedging0.85
2.3Bold2.8
4.2Lists4.6
0.00Emoji0.00
0.12Headings1.12
0.03Transitions0.06
Based on 13 + 27 text responses
Research
What we learned reading every model
FAQ
