O3 Mini vs Step 5 Preview
As of Oct 14, 2026, O3 Mini leads Step 5 Preview in 1 of 3 shared categories: General LLM.
O3 Mini
It used to be. Was SOTA in Reasoning.
Step 5 Preview
#31 Best current rank: #31 in Coding › Web dev, as of Oct 14, 2026.
| Category | O3 Mini | Step 5 Preview |
|---|---|---|
| General LLM | #7 · #7 in General LLM Margin — LMArena leaderboard dataset · Apr 16, 2025 | #60 · #60 in General LLM Margin 40.816326530612244 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #133 · Was SOTA · Reasoning Margin 91.78082191780823 LMArena leaderboard dataset · Oct 13, 2026 | #49 · #49 in Reasoning Margin 34.246575342465746 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #76 · #76 in Science Margin — Epoch AI benchmarking hub · Jan 31, 2025 | — |
| Coding | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Web dev | — | #31 · #31 in Coding › Web dev Margin 28.037383177570092 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #145 · #145 in Long context Margin 98.63945578231292 LMArena leaderboard dataset · Oct 13, 2026 | #56 · #56 in Long context Margin 38.095238095238095 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | — | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #— · Not enough data Margin — Epoch AI benchmarking hub · Jan 31, 2025 | #57 · #57 in Factuality Margin 43.28358208955224 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #51 · #51 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jan 31, 2025 | — |
O3 Mini: $1.9250000000000003 per 1M blended tokens.
Step 5 Preview: $1.4249999999999998 per 1M blended tokens.
O3 Mini: closed weights.
Step 5 Preview: closed weights.
General LLM: As of Oct 14, 2026, O3 Mini leads Step 5 Preview in General LLM at #7 against #60.
Reasoning: As of Oct 14, 2026, Step 5 Preview leads O3 Mini in Reasoning at #49 against #133.
Long context: As of Oct 14, 2026, Step 5 Preview leads O3 Mini in Long context at #56 against #145.
O3 Mini or Step 5 Preview?
As of Oct 14, 2026, O3 Mini leads Step 5 Preview in 1 of 3 shared categories: General LLM.
O3 Mini or Step 5 Preview for General LLM?
As of Oct 14, 2026, O3 Mini leads Step 5 Preview in General LLM at #7 against #60.
O3 Mini or Step 5 Preview for Reasoning?
As of Oct 14, 2026, Step 5 Preview leads O3 Mini in Reasoning at #49 against #133.
O3 Mini or Step 5 Preview for Long context?
As of Oct 14, 2026, Step 5 Preview leads O3 Mini in Long context at #56 against #145.