Kimi K2 5 Thinking vs O3 Mini
As of Oct 14, 2026, Kimi K2 5 Thinking leads O3 Mini in 2 of 3 shared categories: Reasoning and Long context.
Kimi K2 5 Thinking
It used to be. Was SOTA in Coding › Web dev.
O3 Mini
It used to be. Was SOTA in Reasoning.
| Category | Kimi K2 5 Thinking | O3 Mini |
|---|---|---|
| General LLM | #56 · #56 in General LLM Margin 38.095238095238095 LMArena leaderboard dataset · Oct 13, 2026 | #7 · #7 in General LLM Margin — LMArena leaderboard dataset · Apr 16, 2025 |
| Reasoning | #58 · #58 in Reasoning Margin 40.41095890410959 LMArena leaderboard dataset · Oct 13, 2026 | #133 · Was SOTA · Reasoning Margin 91.78082191780823 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 | #61 · #61 in Coding › Web dev Margin 56.074766355140184 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #57 · #57 in Long context Margin 38.775510204081634 LMArena leaderboard dataset · Oct 13, 2026 | #145 · #145 in Long context Margin 98.63945578231292 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | — |
| Factuality | #58 · #58 in Factuality Margin 44.02985074626866 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| Abstraction (ARC) | — | #51 · #51 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
Kimi K2 5 Thinking: price per 1M tokens is unset in the catalog.
O3 Mini: $1.9250000000000003 per 1M blended tokens.
Kimi K2 5 Thinking: open weights.
O3 Mini: closed weights.
General LLM: As of Oct 14, 2026, O3 Mini leads Kimi K2 5 Thinking in General LLM at #7 against #56.
Reasoning: As of Oct 14, 2026, Kimi K2 5 Thinking leads O3 Mini in Reasoning at #58 against #133.
Long context: As of Oct 14, 2026, Kimi K2 5 Thinking leads O3 Mini in Long context at #57 against #145.
Kimi K2 5 Thinking or O3 Mini?
As of Oct 14, 2026, Kimi K2 5 Thinking leads O3 Mini in 2 of 3 shared categories: Reasoning and Long context.
Kimi K2 5 Thinking or O3 Mini for General LLM?
As of Oct 14, 2026, O3 Mini leads Kimi K2 5 Thinking in General LLM at #7 against #56.
Kimi K2 5 Thinking or O3 Mini for Reasoning?
As of Oct 14, 2026, Kimi K2 5 Thinking leads O3 Mini in Reasoning at #58 against #133.
Kimi K2 5 Thinking or O3 Mini for Long context?
As of Oct 14, 2026, Kimi K2 5 Thinking leads O3 Mini in Long context at #57 against #145.