GPT-4 vs GPT-5 Pro
Compare GPT-4 and GPT-5 Pro, both from OpenAI, context windows of 8K vs 400K, tested across 23 shared challenges. Updated May 2026.
Which is better, GPT-4 or GPT-5 Pro?
GPT-4 and GPT-5 Pro are both competitive models. GPT-4 costs $30/M input tokens vs $15/M for GPT-5 Pro. Context windows: 8K vs 400K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-4 and GPT-5 Pro
GPT-4 is made by openai while GPT-5 Pro is from openai. GPT-4 has a 8K token context window compared to GPT-5 Pro's 400K. On pricing, GPT-4 costs $30/M input tokens vs $15/M for GPT-5 Pro.
API pricing
Per 1M tokens
GPT-4
Input
$30.00
Output
$60.00
2.0× cheaper
GPT-5 Pro
Input
$15.00
2.0× cheaper
Output
$120.00
GPT-5 Pro wins input (2.0× cheaper)·GPT-4 wins output (2.0× cheaper)
Our Verdict
GPT-5 Pro
GPT-4Runner-up
No community votes yet. On paper, GPT-5 Pro has the edge — newer, bigger context window.
Too close to call
Writing DNA
Style Comparison
Similarity
53%
GPT-4 uses 82.3x more bold
GPT-4
GPT-5 Pro
59%Vocabulary65%
18wSentence Length15w
1.10Hedging0.32
0.8Bold0.0
2.5Lists2.9
0.00Emoji0.00
0.00Headings0.00
0.45Transitions0.01
Based on 15 + 11 text responses
FAQ
