GPT-4 vs GPT-4.5
Compare GPT-4 and GPT-4.5, both from OpenAI, context windows of 8K vs 128K, tested across 10 shared challenges.
Our Verdict
GPT-4.5
GPT-4Runner-up
No community votes yet. On paper, GPT-4.5 has the edge — newer, bigger context window.
Too close to call
API pricing
Cost per 1M tokens
GPT-4
Input
$30.00
2.5× cheaper
Output
$60.00
2.5× cheaper
GPT-4.5
Input
$75.00
Output
$150.00
GPT-4 is cheaper on both — 2.5× input, 2.5× output
Writing DNA
Style Comparison
Similarity
53%
GPT-4.5 uses 129.6x more headings
GPT-4
GPT-4.5
59%Vocabulary63%
18wSentence Length16w
1.10Hedging0.57
0.8Bold4.7
2.5Lists6.4
0.00Emoji0.00
0.00Headings1.30
0.45Transitions0.54
Based on 15 + 11 text responses
Research
What we learned reading every model
FAQ
Common questions
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