GPT-4o mini vs GPT-5 Pro

Compare GPT-4o mini and GPT-5 Pro, both from OpenAI, context windows of 128K vs 400K, tested across 32 shared challenges. Updated April 2026.

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

GPT-4o mini and GPT-5 Pro are both competitive models. GPT-4o mini costs $0.15/M input tokens vs $15/M for GPT-5 Pro. Context windows: 128K vs 400K tokens. Compare their real outputs side by side below.

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

GPT-4o mini is made by openai while GPT-5 Pro is from openai. GPT-4o mini has a 128K token context window compared to GPT-5 Pro's 400K. On pricing, GPT-4o mini costs $0.15/M input tokens vs $15/M for GPT-5 Pro.

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

No community votes yet. On paper, GPT-5 Pro has the edge — bigger model tier, newer, bigger context window.

GPT-4o mini is 200x cheaper per token — worth considering if cost matters.

Slight edge
Writing DNA

Style Comparison

Similarity
99%

GPT-4o mini uses 384.3x more bold

GPT-4o mini
GPT-5 Pro
54%Vocabulary65%
18wSentence Length15w
0.84Hedging0.32
3.8Bold0.0
3.3Lists2.9
0.00Emoji0.00
1.03Headings0.00
0.23Transitions0.01
Based on 22 + 11 text responses
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GPT-4o miniGPT-5 Pro

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