GPT-4o (Omni)
Nothing here. The model returned empty. We stared at it for a while.
GPT-4o (Omni) vs GPT-5
Compare GPT-4o (Omni) and GPT-5, both from OpenAI, in 19 community votes, gpt-5 wins 78% of head-to-head duels, context windows of 128K vs 400K, tested across 46 shared challenges. Updated April 2026.
Which is better, GPT-4o (Omni) or GPT-5?
GPT-5 is the better choice overall, winning 78% of 19 blind community votes on Rival. GPT-4o (Omni) costs $2.5/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 GPT-4o (Omni) and GPT-5
GPT-4o (Omni) is made by openai while GPT-5 is from openai. GPT-4o (Omni) has a 128K token context window compared to GPT-5's 400K. On pricing, GPT-4o (Omni) costs $2.5/M input tokens vs $1.25/M for GPT-5. In community voting, In 19 community votes, GPT-5 wins 78% of head-to-head duels.
In 19 community votes, GPT-5 wins 78% of head-to-head duels. GPT-4o (Omni) leads in Conversation, while GPT-5 leads in Reasoning, Image Generation, Web Design. Based on blind community voting from the Rival open dataset of 19+ human preference judgments for this pair.
Reasoning: GPT-5 wins 71% of votes
Image Generation: GPT-5 wins 100% of votes
Conversation: GPT-4o (Omni) wins 67% of votes
Web Design: GPT-5 wins 100% of votes
Our Verdict
GPT-5Winner
GPT-4o (Omni)Runner-up
Pick GPT-5. In 19 blind votes, GPT-5 wins 78% of the time. That's not luck.
Pick GPT-4o (Omni) for Conversation. Pick GPT-5 for Image Generation, Web Design, Reasoning.
Clear winner
Writing DNA
Style Comparison
Similarity
93%
GPT-4o (Omni) uses 2.5x more emoji
GPT-4o (Omni)
GPT-5
54%Vocabulary65%
18wSentence Length13w
0.72Hedging0.20
7.3Bold0.2
5.6Lists4.6
0.03Emoji0.00
1.40Headings0.16
0.26Transitions0.03
Based on 24 + 16 text responses
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Model Similarity Index
185x
price gap between models that write identically
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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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