Claude Sonnet 4.5 vs GPT-5.2 Chat
Compare Claude Sonnet 4.5 by Anthropic against GPT-5.2 Chat by OpenAI, in 8 community votes, gpt-5.2 chat wins 60% of head-to-head duels, context windows of 200K vs 128K, tested across 43 shared challenges.
Conversation: Claude Sonnet 4.5 and GPT-5.2 Chat are tied
Our Verdict
GPT-5.2 ChatWinner
Claude Sonnet 4.5Runner-up
Pick GPT-5.2 Chat. In 8 blind votes, GPT-5.2 Chat wins 60% of the time. That's not luck.
Clear winner
API pricing
Cost per 1M tokens
Claude Sonnet 4.5
Input
$3.00
Output
$15.00
GPT-5.2 Chat
Input
$1.75
1.7× cheaper
Output
$14.00
1.1× cheaper
GPT-5.2 Chat is cheaper on both — 1.7× input, 1.1× output
Writing DNA
Style Comparison
Similarity
53%
Claude Sonnet 4.5 uses 5.7x more sentence length
Claude Sonnet 4.5
GPT-5.2 Chat
64%Vocabulary66%
94wSentence Length16w
0.48Hedging0.41
4.9Bold9.6
8.0Lists4.4
0.45Emoji0.31
1.91Headings1.20
0.07Transitions0.27
Based on 20 + 16 text responses
Research
What we learned reading every model
FAQ
