OpenAI o3 vs o3 Mini

Compare OpenAI o3 and o3 Mini, both from OpenAI, in 2 community votes, openai o3 and o3 mini are closely matched, tested across 54 shared challenges. Updated April 2026.

Which is better, OpenAI o3 or o3 Mini?

OpenAI o3 and o3 Mini are closely matched based on 2 community votes. OpenAI o3 costs $10/M input tokens vs $1.1/M for o3 Mini. Compare their real outputs side by side below.

Key Differences Between OpenAI o3 and o3 Mini

OpenAI o3 is made by openai while o3 Mini is from openai. On pricing, OpenAI o3 costs $10/M input tokens vs $1.1/M for o3 Mini. In community voting, In 2 community votes, OpenAI o3 and o3 Mini are closely matched.

In 2 community votes, OpenAI o3 and o3 Mini are closely matched. OpenAI o3 and o3 Mini perform similarly across challenge categories. Based on blind community voting from the Rival open dataset of 2+ human preference judgments for this pair.

Web Design: OpenAI o3 and o3 Mini are tied
Our Verdict
OpenAI o3
OpenAI o3Winner
o3 Mini
o3 MiniRunner-up

Votes are tied. OpenAI o3 is newer and likely incorporates more recent improvements.

o3 Mini is 9.1x cheaper per token — worth considering if cost matters.

Too close to call
Writing DNA

Style Comparison

Similarity
99%

o3 Mini uses 5.6x more bold

OpenAI o3
o3 Mini
68%Vocabulary65%
14wSentence Length17w
0.26Hedging0.74
0.7Bold3.9
3.0Lists1.7
0.00Emoji0.00
0.38Headings0.47
0.12Transitions0.38
Based on 16 + 12 text responses
vs

Ask them anything yourself

OpenAI o3o3 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
Free preview13 of 58 slides
FAQ

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