GPT-5 Mini vs GPT-5.5
Compare GPT-5 Mini and GPT-5.5, both from OpenAI, tested across 54 shared challenges.
Our Verdict
GPT-5.5
GPT-5 MiniRunner-up
No community votes yet. On paper, GPT-5.5 has the edge — bigger model tier, newer, bigger context window.
GPT-5 Mini is 15x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-5 Mini
Input
$0.25
20× cheaper
Output
$2.00
15× cheaper
GPT-5.5
Input
$5.00
Output
$30.00
GPT-5 Mini is cheaper on both — 20× input, 15× output
Writing DNA
Style Comparison
Similarity
46%
GPT-5.5 uses 285.6x more bold
GPT-5 Mini
GPT-5.5
62%Vocabulary58%
21wSentence Length18w
0.16Hedging0.74
0.0Bold2.9
3.4Lists5.1
0.00Emoji0.00
0.00Headings1.68
0.05Transitions0.03
Based on 15 + 26 text responses
Research
What we learned reading every model
FAQ
