Claude Opus 5 vs GPT-5.2
Compare Claude Opus 5 by Anthropic against GPT-5.2 by OpenAI, context windows of 1.0M vs 400K, tested across 52 shared challenges.
Our Verdict
Claude Opus 5
GPT-5.2Runner-up
No community votes yet. On paper, Claude Opus 5 has the edge — newer, bigger context window.
Too close to call
API pricing
Cost per 1M tokens
Claude Opus 5
Input
$5.00
Output
$25.00
GPT-5.2
Input
$1.75
2.9× cheaper
Output
$14.00
1.8× cheaper
GPT-5.2 is cheaper on both — 2.9× input, 1.8× output
Writing DNA
Style Comparison
Similarity
48%
GPT-5.2 uses 6.1x more transitions
Claude Opus 5
GPT-5.2
54%Vocabulary64%
21wSentence Length16w
0.40Hedging0.34
3.9Bold9.4
1.9Lists3.9
0.02Emoji0.06
0.71Headings0.89
0.05Transitions0.31
Based on 27 + 15 text responses
Research
What we learned reading every model
FAQ
