GPT-4.5 vs GPT-5.4
Compare GPT-4.5 and GPT-5.4, both from OpenAI, context windows of 128K vs 1.1M, tested across 24 shared challenges.
Our Verdict
GPT-5.4
GPT-4.5Runner-up
No community votes yet. On paper, GPT-5.4 has the edge — newer, bigger context window.
GPT-5.4 is 10x 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-5.4
Input
$2.50
30× cheaper
Output
$15.00
10× cheaper
GPT-5.4 is cheaper on both — 30× input, 10× output
Writing DNA
Style Comparison
Similarity
51%
GPT-4.5 uses 29.1x more transitions
GPT-4.5
GPT-5.4
63%Vocabulary54%
16wSentence Length28w
0.57Hedging0.69
4.7Bold4.1
6.4Lists8.1
0.00Emoji0.00
1.30Headings1.84
0.54Transitions0.02
Based on 11 + 22 text responses
Research
What we learned reading every model
FAQ
Common questions
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