GPT-4.5 vs GPT-5.2 Chat
Compare GPT-4.5 and GPT-5.2 Chat, both from OpenAI, context windows of 128K vs 128K, tested across 25 shared challenges.
Our Verdict
GPT-4.5
GPT-5.2 Chat
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
GPT-5.2 Chat is 11x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-4.5
Input
$75.00
Output
$150.00
GPT-5.2 Chat
Input
$1.75
43× cheaper
Output
$14.00
11× cheaper
GPT-5.2 Chat is cheaper on both — 43× input, 11× output
Writing DNA
Style Comparison
Similarity
61%
GPT-5.2 Chat uses 30.6x more emoji
GPT-4.5
GPT-5.2 Chat
63%Vocabulary66%
16wSentence Length16w
0.57Hedging0.41
4.7Bold9.6
6.4Lists4.4
0.00Emoji0.31
1.30Headings1.20
0.54Transitions0.27
Based on 11 + 16 text responses
Research
What we learned reading every model
FAQ
Common questions
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