o1 vs o3 Mini

Compare o1 and o3 Mini, both from OpenAI, in 2 community votes, o1 and o3 mini are closely matched, context windows of 128K vs 64K, tested across 39 shared challenges. Updated February 2026.

In 2 community votes, o1 and o3 Mini are closely matched. o1 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.

Reasoning: o1 and o3 Mini are tied
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