OpenAI o4-mini
Nothing here. The model returned empty. We stared at it for a while.
OpenAI o4-mini vs GPT-5
Compare OpenAI o4-mini and GPT-5, both from OpenAI, tested across 35 shared challenges. Updated April 2026.
Which is better, OpenAI o4-mini or GPT-5?
OpenAI o4-mini and GPT-5 are both competitive models. OpenAI o4-mini costs $1.1/M input tokens vs $1.25/M for GPT-5. Compare their real outputs side by side below.
Key Differences Between OpenAI o4-mini and GPT-5
OpenAI o4-mini is made by openai while GPT-5 is from openai. On pricing, OpenAI o4-mini costs $1.1/M input tokens vs $1.25/M for GPT-5.
Our Verdict
GPT-5
OpenAI o4-miniRunner-up
No community votes yet. On paper, GPT-5 has the edge — bigger model tier, newer, bigger context window.
Too close to call
Writing DNA
Style Comparison
Similarity
98%
GPT-5 uses 18.9x more bold
OpenAI o4-mini
GPT-5
73%Vocabulary65%
15wSentence Length13w
0.18Hedging0.20
0.0Bold0.2
2.1Lists4.6
0.00Emoji0.00
0.00Headings0.16
0.02Transitions0.03
Based on 10 + 16 text responses
vsAsk them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
Model Similarity Index
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
Devstral M / S
95.7%
Qwen3 Coder / Flash
95.6%
GPT-5.4 / Mini
93.3%
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
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