Claude Opus 5 vs OpenAI: GPT-5.6 Sol
Compare Claude Opus 5 by Anthropic against OpenAI: GPT-5.6 Sol by OpenAI, context windows of 1.0M vs 1.1M, tested across 54 shared challenges.
Our Verdict
Claude Opus 5
OpenAI: GPT-5.6 Sol
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 Opus 5
Input
$5.00
Output
$25.00
1.2× cheaper
OpenAI: GPT-5.6 Sol
Input
$5.00
Output
$30.00
Writing DNA
Style Comparison
Similarity
44%
OpenAI: GPT-5.6 Sol uses 2.0x more lists
Claude Opus 5
OpenAI: GPT-5.6 Sol
54%Vocabulary63%
21wSentence Length15w
0.40Hedging0.79
3.9Bold3.4
1.9Lists3.8
0.02Emoji0.03
0.71Headings0.95
0.05Transitions0.08
Based on 27 + 27 text responses
Research
What we learned reading every model
FAQ
