GPT-4o (Omni) vs OpenAI o4-mini

Compare GPT-4o (Omni) and OpenAI o4-mini, both from OpenAI, in 3 community votes, gpt-4o (omni) wins 67% of head-to-head duels, tested across 34 shared challenges. Updated April 2026.

Which is better, GPT-4o (Omni) or OpenAI o4-mini?

GPT-4o (Omni) is the better choice overall, winning 67% of 3 blind community votes on Rival. GPT-4o (Omni) costs $2.5/M input tokens vs $1.1/M for OpenAI o4-mini. Compare their real outputs side by side below.

Key Differences Between GPT-4o (Omni) and OpenAI o4-mini

GPT-4o (Omni) is made by openai while OpenAI o4-mini is from openai. On pricing, GPT-4o (Omni) costs $2.5/M input tokens vs $1.1/M for OpenAI o4-mini. In community voting, In 3 community votes, GPT-4o (Omni) wins 67% of head-to-head duels.

In 3 community votes, GPT-4o (Omni) wins 67% of head-to-head duels. Based on blind community voting from the Rival open dataset of 3+ human preference judgments for this pair.

Our Verdict
GPT-4o (Omni)
GPT-4o (Omni)Winner
OpenAI o4-mini
OpenAI o4-miniRunner-up

Pick GPT-4o (Omni). In 3 blind votes, GPT-4o (Omni) wins 67% of the time. That's not luck.

Clear winner
Writing DNA

Style Comparison

Similarity
85%

GPT-4o (Omni) uses 734.5x more bold

GPT-4o (Omni)
OpenAI o4-mini
54%Vocabulary73%
18wSentence Length15w
0.72Hedging0.18
7.3Bold0.0
5.6Lists2.1
0.03Emoji0.00
1.40Headings0.00
0.26Transitions0.02
Based on 24 + 10 text responses
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GPT-4o (Omni)OpenAI o4-mini

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
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