Claude Opus 5 vs GPT-5.2 Pro
Compare Claude Opus 5 by Anthropic against GPT-5.2 Pro by OpenAI, context windows of 1.0M vs 400K, tested across 31 shared challenges.
Our Verdict
Claude Opus 5
GPT-5.2 ProRunner-up
No community votes yet. On paper, Claude Opus 5 has the edge — newer, bigger context window.
Claude Opus 5 is 6.7x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Claude Opus 5
Input
$5.00
4.2× cheaper
Output
$25.00
6.7× cheaper
GPT-5.2 Pro
Input
$21.00
Output
$168.00
Claude Opus 5 is cheaper on both — 4.2× input, 6.7× output
Writing DNA
Style Comparison
Similarity
51%
Claude Opus 5 uses 1.7x more emoji
Claude Opus 5
GPT-5.2 Pro
54%Vocabulary62%
21wSentence Length19w
0.40Hedging0.39
3.9Bold8.6
1.9Lists3.8
0.02Emoji0.00
0.71Headings1.17
0.05Transitions0.02
Based on 27 + 10 text responses
Research
What we learned reading every model
FAQ
