o3 Mini vs OpenAI o3

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

Which is better, o3 Mini or OpenAI o3?

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

Key Differences Between o3 Mini and OpenAI o3

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

In 2 community votes, o3 Mini and OpenAI o3 are closely matched. o3 Mini and OpenAI o3 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: o3 Mini and OpenAI o3 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

o3 Mini
OpenAI o3
65%Vocabulary68%
17wSentence Length14w
0.74Hedging0.26
3.9Bold0.7
1.7Lists3.0
0.00Emoji0.00
0.47Headings0.38
0.38Transitions0.12
Based on 12 + 16 text responses
vs

Ask them anything yourself

o3 MiniOpenAI o3

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

Common questions