Claude Sonnet 4.6 vs OpenAI: GPT-5.6 Terra
Compare Claude Sonnet 4.6 by Anthropic against OpenAI: GPT-5.6 Terra by OpenAI, context windows of 1.0M vs 1.1M, tested across 53 shared challenges.
Our Verdict
Claude Sonnet 4.6
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
Claude Sonnet 4.6
Input
$3.00
Output
$15.00
OpenAI: GPT-5.6 Terra
Input
$2.50
1.2× cheaper
Output
$15.00
Writing DNA
Style Comparison
Similarity
56%
Claude Sonnet 4.6 uses 19.1x more emoji
Claude Sonnet 4.6
OpenAI: GPT-5.6 Terra
56%Vocabulary57%
36wSentence Length18w
0.53Hedging0.85
5.1Bold2.8
3.4Lists4.6
0.19Emoji0.00
2.10Headings1.12
0.02Transitions0.06
Based on 23 + 27 text responses
Research
What we learned reading every model
FAQ
