Kimi K3 vs Step 5 Preview
As of Oct 14, 2026, Kimi K3 leads Step 5 Preview in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Kimi K3
Yes. Yes on General LLM (open weights); Reasoning (open weights). Not the overall leader.
Step 5 Preview
#31 Best current rank: #31 in Coding › Web dev, as of Oct 14, 2026.
| Category | Kimi K3 | Step 5 Preview |
|---|---|---|
| General LLM | #13 · #13 in General LLM Margin 8.84353741496598 LMArena leaderboard dataset · Oct 13, 2026 | #60 · #60 in General LLM Margin 40.816326530612244 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #7 · #7 in Reasoning Margin 5.479452054794521 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 | #17 · #17 in Science Margin — Epoch AI benchmarking hub · Jul 16, 2026 | — |
| Coding | #— · Not enough data Margin — Scale Labs leaderboards · Oct 14, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Web dev | #11 · Was SOTA · Coding › Web dev Margin 9.34579439252336 LMArena leaderboard dataset · Oct 13, 2026 | #31 · #31 in Coding › Web dev Margin 28.037383177570092 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #8 · Was SOTA · Long context Margin 5.442176870748298 LMArena leaderboard dataset · Oct 13, 2026 | #56 · #56 in Long context Margin 38.095238095238095 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #22 · #22 in Vision Margin 60.526315789473685 Epoch AI benchmarking hub · Jul 16, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #19 · #19 in Factuality Margin 14.925373134328368 LMArena leaderboard dataset · Oct 13, 2026 | #57 · #57 in Factuality Margin 43.28358208955224 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #8 · #8 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 16, 2026 | — |
Kimi K3: $4.125 per 1M blended tokens.
Step 5 Preview: $1.4249999999999998 per 1M blended tokens.
Kimi K3: open weights.
Step 5 Preview: closed weights.
General LLM: As of Oct 14, 2026, Kimi K3 leads Step 5 Preview in General LLM at #13 against #60.
Reasoning: As of Oct 14, 2026, Kimi K3 leads Step 5 Preview in Reasoning at #7 against #49.
Coding › Web dev: As of Oct 14, 2026, Kimi K3 leads Step 5 Preview in Coding › Web dev at #11 against #31.
Long context: As of Oct 14, 2026, Kimi K3 leads Step 5 Preview in Long context at #8 against #56.
Factuality: As of Oct 14, 2026, Kimi K3 leads Step 5 Preview in Factuality at #19 against #57.
Kimi K3 or Step 5 Preview?
As of Oct 14, 2026, Kimi K3 leads Step 5 Preview in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Kimi K3 or Step 5 Preview for General LLM?
As of Oct 14, 2026, Kimi K3 leads Step 5 Preview in General LLM at #13 against #60.
Kimi K3 or Step 5 Preview for Reasoning?
As of Oct 14, 2026, Kimi K3 leads Step 5 Preview in Reasoning at #7 against #49.
Kimi K3 or Step 5 Preview for Coding › Web dev?
As of Oct 14, 2026, Kimi K3 leads Step 5 Preview in Coding › Web dev at #11 against #31.