GPT-4.5 vs OpenAI o3
Compare GPT-4.5 and OpenAI o3, both from OpenAI, in 2 community votes, gpt-4.5 and openai o3 are closely matched, tested across 25 shared challenges.
Our Verdict
GPT-4.5
OpenAI o3
Genuinely even. Both are strong choices.
OpenAI o3 is 3.8x 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
OpenAI o3
Input
$10.00
7.5× cheaper
Output
$40.00
3.8× cheaper
OpenAI o3 is cheaper on both — 7.5× input, 3.8× output
Writing DNA
Style Comparison
Similarity
48%
GPT-4.5 uses 6.7x more bold
GPT-4.5
OpenAI o3
63%Vocabulary68%
16wSentence Length14w
0.57Hedging0.26
4.7Bold0.7
6.4Lists3.0
0.00Emoji0.00
1.30Headings0.38
0.54Transitions0.12
Based on 11 + 16 text responses
Research
What we learned reading every model
FAQ
Common questions
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