GPT-4.5
Nothing here. The model returned empty. We stared at it for a while.
GPT-4.5 vs GPT-5 Nano
Compare GPT-4.5 and GPT-5 Nano, both from OpenAI, tested across 25 shared challenges. Updated April 2026.
Which is better, GPT-4.5 or GPT-5 Nano?
GPT-4.5 and GPT-5 Nano are both competitive models. Compare their real outputs side by side below.
Key Differences Between GPT-4.5 and GPT-5 Nano
GPT-4.5 is made by openai while GPT-5 Nano is from openai.
Our Verdict
GPT-4.5
GPT-5 Nano
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Too close to call
Writing DNA
Style Comparison
Similarity
99%
GPT-4.5 uses 466.6x more bold
GPT-4.5
GPT-5 Nano
63%Vocabulary59%
16wSentence Length25w
0.57Hedging0.23
4.7Bold0.0
6.4Lists4.2
0.00Emoji0.00
1.30Headings0.00
0.54Transitions0.01
Based on 11 + 14 text responses
vsAsk them anything yourself
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
Free preview13 of 58 slides
FAQ