Claude Sonnet 4 vs GPT-5.2 Pro
Compare Claude Sonnet 4 by Anthropic against GPT-5.2 Pro by OpenAI, context windows of 200K vs 400K, tested across 31 shared challenges.
Our Verdict
GPT-5.2 Pro
Claude Sonnet 4Runner-up
No community votes yet. On paper, GPT-5.2 Pro has the edge — bigger model tier, newer, bigger context window.
Claude Sonnet 4 is 11x cheaper per token — worth considering if cost matters.
Slight edge
API pricing
Cost per 1M tokens
Claude Sonnet 4
Input
$3.00
7.0× cheaper
Output
$15.00
11× cheaper
GPT-5.2 Pro
Input
$21.00
Output
$168.00
Claude Sonnet 4 is cheaper on both — 7.0× input, 11× output
Writing DNA
Style Comparison
Similarity
43%
Claude Sonnet 4 uses 87.9x more emoji
Claude Sonnet 4
GPT-5.2 Pro
62%Vocabulary62%
111wSentence Length19w
0.40Hedging0.39
5.0Bold8.6
9.3Lists3.8
0.88Emoji0.00
2.16Headings1.17
0.33Transitions0.02
Based on 17 + 10 text responses
Research
What we learned reading every model
FAQ
