GPT-4.5 vs GPT-4o mini
Compare GPT-4.5 and GPT-4o mini, both from OpenAI, context windows of 128K vs 128K, tested across 25 shared challenges.
Our Verdict
GPT-4.5
GPT-4o miniRunner-up
No community votes yet. On paper, GPT-4.5 has the edge — bigger model tier, newer.
GPT-4o mini is 250x 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-4o mini
Input
$0.15
500× cheaper
Output
$0.60
250× cheaper
GPT-4o mini is cheaper on both — 500× input, 250× output
Writing DNA
Style Comparison
Similarity
64%
GPT-4.5 uses 2.3x more transitions
GPT-4.5
GPT-4o mini
63%Vocabulary54%
16wSentence Length18w
0.57Hedging0.84
4.7Bold3.8
6.4Lists3.3
0.00Emoji0.00
1.30Headings1.03
0.54Transitions0.23
Based on 11 + 22 text responses
Research
What we learned reading every model
FAQ
