GPT-4o mini vs GPT-5

Compare GPT-4o mini and GPT-5, both from OpenAI, context windows of 128K vs 400K, tested across 38 shared challenges. Updated April 2026.

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

GPT-4o mini and GPT-5 are both competitive models. GPT-4o mini costs $0.15/M input tokens vs $1.25/M for GPT-5. Context windows: 128K vs 400K tokens. Compare their real outputs side by side below.

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

GPT-4o mini is made by openai while GPT-5 is from openai. GPT-4o mini has a 128K token context window compared to GPT-5's 400K. On pricing, GPT-4o mini costs $0.15/M input tokens vs $1.25/M for GPT-5.

Our Verdict
GPT-5
GPT-5
GPT-4o mini
GPT-4o miniRunner-up

No community votes yet. On paper, GPT-5 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 20.4x more bold

GPT-4o mini
GPT-5
54%Vocabulary65%
18wSentence Length13w
0.84Hedging0.20
3.8Bold0.2
3.3Lists4.6
0.00Emoji0.00
1.03Headings0.16
0.23Transitions0.03
Based on 22 + 16 text responses
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GPT-4o miniGPT-5

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