GPT-4o mini vs Gemini 2.5 Pro Preview 06-05

Compare GPT-4o mini by OpenAI against Gemini 2.5 Pro Preview 06-05 by Google AI, context windows of 128K vs 1.0M, tested across 31 shared challenges. Updated April 2026.

Which is better, GPT-4o mini or Gemini 2.5 Pro Preview 06-05?

GPT-4o mini and Gemini 2.5 Pro Preview 06-05 are both competitive models. GPT-4o mini costs $0.15/M input tokens vs $1.25/M for Gemini 2.5 Pro Preview 06-05. Context windows: 128K vs 1049K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-4o mini and Gemini 2.5 Pro Preview 06-05

GPT-4o mini is made by openai while Gemini 2.5 Pro Preview 06-05 is from google. GPT-4o mini has a 128K token context window compared to Gemini 2.5 Pro Preview 06-05's 1049K. On pricing, GPT-4o mini costs $0.15/M input tokens vs $1.25/M for Gemini 2.5 Pro Preview 06-05.

Our Verdict
Gemini 2.5 Pro Preview 06-05
Gemini 2.5 Pro Preview 06-05
GPT-4o mini
GPT-4o miniRunner-up

No community votes yet. On paper, Gemini 2.5 Pro Preview 06-05 has the edge — bigger model tier, newer, bigger context window.

GPT-4o mini is 17x cheaper per token — worth considering if cost matters.

Slight edge
Writing DNA

Style Comparison

Similarity
100%

GPT-4o mini uses 4.5x more transitions

GPT-4o mini
Gemini 2.5 Pro Preview 06-05
54%Vocabulary51%
18wSentence Length15w
0.84Hedging0.31
3.8Bold4.8
3.3Lists4.1
0.00Emoji0.00
1.03Headings0.98
0.23Transitions0.05
Based on 22 + 20 text responses
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GPT-4o miniGemini 2.5 Pro Preview 06-05

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