Claude Sonnet 4.5 vs Kimi K3
As of Oct 14, 2026, Claude Sonnet 4.5 leads Kimi K3 in 0 of 7 shared categories.
Claude Sonnet 4.5
It used to be. Was SOTA in General LLM.
Kimi K3
Yes. Yes on General LLM (open weights); Reasoning (open weights). Not the overall leader.
| Category | Claude Sonnet 4.5 | Kimi K3 |
|---|---|---|
| General LLM | #49 · Was SOTA · General LLM Margin 33.33333333333333 LMArena leaderboard dataset · Oct 13, 2026 | #13 · #13 in General LLM Margin 8.84353741496598 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #40 · Was SOTA · Reasoning Margin 28.082191780821915 LMArena leaderboard dataset · Oct 13, 2026 | #7 · #7 in Reasoning Margin 5.479452054794521 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #25 · #25 in Math Margin 53.333333333333336 Epoch AI benchmarking hub · Sep 29, 2025 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #82 · #82 in Science Margin — Epoch AI benchmarking hub · Sep 29, 2025 | #17 · #17 in Science Margin — Epoch AI benchmarking hub · Jul 16, 2026 |
| Coding | #— · Not enough data Margin — Epoch AI benchmarking hub · Sep 29, 2025 | #— · Not enough data Margin — Scale Labs leaderboards · Oct 14, 2026 |
| Coding › Web dev | #78 · Was SOTA · Coding › Web dev Margin 71.96261682242991 LMArena leaderboard dataset · Oct 13, 2026 | #11 · Was SOTA · Coding › Web dev Margin 9.34579439252336 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #29 · Was SOTA · Long context Margin 19.72789115646259 LMArena leaderboard dataset · Oct 13, 2026 | #8 · Was SOTA · Long context Margin 5.442176870748298 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | — | #22 · #22 in Vision Margin 60.526315789473685 Epoch AI benchmarking hub · Jul 16, 2026 |
| Factuality | #50 · #50 in Factuality Margin 38.059701492537314 LMArena leaderboard dataset · Oct 13, 2026 | #19 · #19 in Factuality Margin 14.925373134328368 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #66 · #66 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 29, 2025 | #8 · #8 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 16, 2026 |
Claude Sonnet 4.5: $6 per 1M blended tokens.
Kimi K3: $4.125 per 1M blended tokens.
Claude Sonnet 4.5: closed weights.
Kimi K3: open weights.
General LLM: As of Oct 14, 2026, Kimi K3 leads Claude Sonnet 4.5 in General LLM at #13 against #49.
Reasoning: As of Oct 14, 2026, Kimi K3 leads Claude Sonnet 4.5 in Reasoning at #7 against #40.
Science: As of Oct 14, 2026, Kimi K3 leads Claude Sonnet 4.5 in Science at #17 against #82.
Coding › Web dev: As of Oct 14, 2026, Kimi K3 leads Claude Sonnet 4.5 in Coding › Web dev at #11 against #78.
Long context: As of Oct 14, 2026, Kimi K3 leads Claude Sonnet 4.5 in Long context at #8 against #29.
Factuality: As of Oct 14, 2026, Kimi K3 leads Claude Sonnet 4.5 in Factuality at #19 against #50.
Abstraction (ARC): As of Oct 14, 2026, Kimi K3 leads Claude Sonnet 4.5 in Abstraction (ARC) at #8 against #66.
Claude Sonnet 4.5 or Kimi K3?
As of Oct 14, 2026, Claude Sonnet 4.5 leads Kimi K3 in 0 of 7 shared categories.
Claude Sonnet 4.5 or Kimi K3 for General LLM?
As of Oct 14, 2026, Kimi K3 leads Claude Sonnet 4.5 in General LLM at #13 against #49.
Claude Sonnet 4.5 or Kimi K3 for Reasoning?
As of Oct 14, 2026, Kimi K3 leads Claude Sonnet 4.5 in Reasoning at #7 against #40.
Claude Sonnet 4.5 or Kimi K3 for Science?
As of Oct 14, 2026, Kimi K3 leads Claude Sonnet 4.5 in Science at #17 against #82.