Gemini 3 Pro Preview vs GPT-5 Mini

Compare Gemini 3 Pro Preview by Google AI against GPT-5 Mini by OpenAI, tested across 44 shared challenges. Updated April 2026.

Which is better, Gemini 3 Pro Preview or GPT-5 Mini?

Gemini 3 Pro Preview and GPT-5 Mini are both competitive models. Compare their real outputs side by side below.

Key Differences Between Gemini 3 Pro Preview and GPT-5 Mini

Gemini 3 Pro Preview is made by google while GPT-5 Mini is from openai.

Our Verdict
Gemini 3 Pro Preview
Gemini 3 Pro Preview
GPT-5 Mini
GPT-5 MiniRunner-up

No community votes yet. On paper, Gemini 3 Pro Preview has the edge — bigger model tier, newer.

Too close to call
Writing DNA

Style Comparison

Similarity
97%

Gemini 3 Pro Preview uses 768.4x more bold

Gemini 3 Pro Preview
GPT-5 Mini
58%Vocabulary62%
17wSentence Length21w
0.37Hedging0.16
7.7Bold0.0
4.8Lists3.4
0.00Emoji0.00
0.90Headings0.00
0.25Transitions0.05
Based on 23 + 15 text responses
vs

Ask them anything yourself

Gemini 3 Pro PreviewGPT-5 Mini

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