ChatGPT-4o (March 2025)
Nothing here. The model returned empty. We stared at it for a while.
ChatGPT-4o (March 2025) vs GPT-5
Compare ChatGPT-4o (March 2025) and GPT-5, both from OpenAI, context windows of 128K vs 400K, tested across 27 shared challenges. Updated April 2026.
Which is better, ChatGPT-4o (March 2025) or GPT-5?
ChatGPT-4o (March 2025) and GPT-5 are both competitive models. ChatGPT-4o (March 2025) costs $5/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 ChatGPT-4o (March 2025) and GPT-5
ChatGPT-4o (March 2025) is made by openai while GPT-5 is from openai. ChatGPT-4o (March 2025) has a 128K token context window compared to GPT-5's 400K. On pricing, ChatGPT-4o (March 2025) costs $5/M input tokens vs $1.25/M for GPT-5.
Our Verdict
GPT-5
ChatGPT-4o (March 2025)Runner-up
No community votes yet. On paper, GPT-5 has the edge — newer, bigger context window.
Too close to call
Writing DNA
Style Comparison
Similarity
91%
ChatGPT-4o (March 2025) uses 94.5x more emoji
ChatGPT-4o (March 2025)
GPT-5
55%Vocabulary65%
24wSentence Length13w
0.52Hedging0.20
3.3Bold0.2
6.0Lists4.6
0.94Emoji0.00
0.63Headings0.16
0.05Transitions0.03
Based on 15 + 16 text responses
vsAsk them anything yourself
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
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