o3 Mini vs o1

Compare o3 Mini and o1, both from OpenAI, in 2 community votes, o3 mini and o1 are closely matched, context windows of 64K vs 128K, tested across 54 shared challenges. Updated April 2026.

Which is better, o3 Mini or o1?

o3 Mini and o1 are closely matched based on 2 community votes. o3 Mini costs $1.1/M input tokens vs $15/M for o1. Context windows: 64K vs 128K tokens. Compare their real outputs side by side below.

Key Differences Between o3 Mini and o1

o3 Mini is made by openai while o1 is from openai. o3 Mini has a 64K token context window compared to o1's 128K. On pricing, o3 Mini costs $1.1/M input tokens vs $15/M for o1. In community voting, In 2 community votes, o3 Mini and o1 are closely matched.

In 2 community votes, o3 Mini and o1 are closely matched. o3 Mini and o1 perform similarly across challenge categories. Based on blind community voting from the Rival open dataset of 2+ human preference judgments for this pair.

Reasoning: o3 Mini and o1 are tied
Our Verdict
o1
o1Winner
o3 Mini
o3 MiniRunner-up

Votes are tied. o1 has a 128K context window vs 64K — handles longer documents.

o3 Mini is 14x cheaper per token — worth considering if cost matters.

Too close to call
Writing DNA

Style Comparison

Similarity
99%

o1 uses 1.5x more lists

o3 Mini
o1
65%Vocabulary64%
17wSentence Length16w
0.74Hedging0.76
3.9Bold5.0
1.7Lists2.6
0.00Emoji0.00
0.47Headings0.44
0.38Transitions0.40
Based on 12 + 13 text responses
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o3 Minio1

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
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