Kimi K2 5 Instant vs O3 Mini
As of Oct 14, 2026, Kimi K2 5 Instant leads O3 Mini in 2 of 3 shared categories: Reasoning and Long context.
Kimi K2 5 Instant
#71 Best current rank: #71 in Reasoning, as of Oct 14, 2026.
O3 Mini
It used to be. Was SOTA in Reasoning.
| Category | Kimi K2 5 Instant | O3 Mini |
|---|---|---|
| General LLM | #80 · #80 in General LLM Margin 54.42176870748299 LMArena leaderboard dataset · Oct 13, 2026 | #7 · #7 in General LLM Margin — LMArena leaderboard dataset · Apr 16, 2025 |
| Reasoning | #71 · #71 in Reasoning Margin 49.31506849315068 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 | #71 · #71 in Coding › Web dev Margin 65.42056074766356 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #78 · #78 in Long context Margin 53.06122448979592 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 | #85 · #85 in Factuality Margin 64.17910447761194 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 Instant: price per 1M tokens is unset in the catalog.
O3 Mini: $1.9250000000000003 per 1M blended tokens.
Kimi K2 5 Instant: open weights.
O3 Mini: closed weights.
General LLM: As of Oct 14, 2026, O3 Mini leads Kimi K2 5 Instant in General LLM at #7 against #80.
Reasoning: As of Oct 14, 2026, Kimi K2 5 Instant leads O3 Mini in Reasoning at #71 against #133.
Long context: As of Oct 14, 2026, Kimi K2 5 Instant leads O3 Mini in Long context at #78 against #145.
Kimi K2 5 Instant or O3 Mini?
As of Oct 14, 2026, Kimi K2 5 Instant leads O3 Mini in 2 of 3 shared categories: Reasoning and Long context.
Kimi K2 5 Instant or O3 Mini for General LLM?
As of Oct 14, 2026, O3 Mini leads Kimi K2 5 Instant in General LLM at #7 against #80.
Kimi K2 5 Instant or O3 Mini for Reasoning?
As of Oct 14, 2026, Kimi K2 5 Instant leads O3 Mini in Reasoning at #71 against #133.
Kimi K2 5 Instant or O3 Mini for Long context?
As of Oct 14, 2026, Kimi K2 5 Instant leads O3 Mini in Long context at #78 against #145.