GPT-4o mini vs GPT-5 Nano

Compare GPT-4o mini and GPT-5 Nano, both from OpenAI, in 106 community votes, gpt-4o mini and gpt-5 nano are closely matched, tested across 38 shared challenges. Updated April 2026.

Which is better, GPT-4o mini or GPT-5 Nano?

GPT-4o mini and GPT-5 Nano are closely matched based on 106 community votes. Compare their real outputs side by side below.

Key Differences Between GPT-4o mini and GPT-5 Nano

GPT-4o mini is made by openai while GPT-5 Nano is from openai. In community voting, In 106 community votes, GPT-4o mini and GPT-5 Nano are closely matched.

In 106 community votes, GPT-4o mini and GPT-5 Nano are closely matched. GPT-4o mini leads in Image Generation, while GPT-5 Nano leads in Reasoning. Based on blind community voting from the Rival open dataset of 106+ human preference judgments for this pair.

Reasoning: GPT-5 Nano wins 61% of votes
Web Design: GPT-4o mini and GPT-5 Nano are tied
Image Generation: GPT-4o mini wins 75% of votes
Conversation: GPT-4o mini and GPT-5 Nano are tied
Our Verdict
GPT-4o mini
GPT-4o mini
GPT-5 Nano
GPT-5 Nano

Too close to call. Pick based on your use case.

Pick GPT-4o mini for Image Generation. Pick GPT-5 Nano for Reasoning.

Too close to call
Writing DNA

Style Comparison

Similarity
95%

GPT-4o mini uses 384.3x more bold

GPT-4o mini
GPT-5 Nano
54%Vocabulary59%
18wSentence Length25w
0.84Hedging0.23
3.8Bold0.0
3.3Lists4.2
0.00Emoji0.00
1.03Headings0.00
0.23Transitions0.01
Based on 22 + 14 text responses
vs

Ask them anything yourself

GPT-4o miniGPT-5 Nano

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
Free preview13 of 58 slides
FAQ

Common questions