GPT-4.5 vs GPT-5 Mini
Compare GPT-4.5 and GPT-5 Mini, both from OpenAI, tested across 25 shared challenges.
Our Verdict
GPT-4.5
GPT-5 Mini
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
GPT-5 Mini is 75x 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 Mini
Input
$0.25
300× cheaper
Output
$2.00
75× cheaper
GPT-5 Mini is cheaper on both — 300× input, 75× output
Writing DNA
Style Comparison
Similarity
44%
GPT-4.5 uses 466.6x more bold
GPT-4.5
GPT-5 Mini
63%Vocabulary62%
16wSentence Length21w
0.57Hedging0.16
4.7Bold0.0
6.4Lists3.4
0.00Emoji0.00
1.30Headings0.00
0.54Transitions0.05
Based on 11 + 15 text responses
Research
What we learned reading every model
FAQ
Common questions
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