Claude Opus 4.5 vs Kimi K3
As of Oct 14, 2026, Claude Opus 4.5 leads Kimi K3 in 0 of 7 shared categories.
Claude Opus 4.5
It used to be. Was SOTA in Reasoning.
Kimi K3
Yes. Yes on General LLM (open weights); Reasoning (open weights). Not the overall leader.
| Category | Claude Opus 4.5 | Kimi K3 |
|---|---|---|
| General LLM | #33 · #33 in General LLM Margin 22.448979591836732 LMArena leaderboard dataset · Oct 13, 2026 | #13 · #13 in General LLM Margin 8.84353741496598 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #28 · Was SOTA · Reasoning Margin 19.86301369863014 LMArena leaderboard dataset · Oct 13, 2026 | #7 · #7 in Reasoning Margin 5.479452054794521 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #16 · #16 in Math Margin 33.33333333333333 Epoch AI benchmarking hub · Nov 24, 2025 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #68 · #68 in Science Margin — Epoch AI benchmarking hub · Nov 24, 2025 | #17 · #17 in Science Margin — Epoch AI benchmarking hub · Jul 16, 2026 |
| Coding | #— · Not enough data Margin — Epoch AI benchmarking hub · Nov 24, 2025 | #— · Not enough data Margin — Scale Labs leaderboards · Oct 14, 2026 |
| Coding › Web dev | #53 · Was SOTA · Coding › Web dev Margin 48.598130841121495 LMArena leaderboard dataset · Oct 13, 2026 | #11 · Was SOTA · Coding › Web dev Margin 9.34579439252336 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #19 · Was SOTA · Long context Margin 12.925170068027214 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 | #36 · #36 in Factuality Margin 27.611940298507463 LMArena leaderboard dataset · Oct 13, 2026 | #19 · #19 in Factuality Margin 14.925373134328368 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #49 · #49 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Nov 24, 2025 | #8 · #8 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 16, 2026 |
Claude Opus 4.5: $10 per 1M blended tokens.
Kimi K3: $4.125 per 1M blended tokens.
Claude Opus 4.5: closed weights.
Kimi K3: open weights.
General LLM: As of Oct 14, 2026, Kimi K3 leads Claude Opus 4.5 in General LLM at #13 against #33.
Reasoning: As of Oct 14, 2026, Kimi K3 leads Claude Opus 4.5 in Reasoning at #7 against #28.
Science: As of Oct 14, 2026, Kimi K3 leads Claude Opus 4.5 in Science at #17 against #68.
Coding › Web dev: As of Oct 14, 2026, Kimi K3 leads Claude Opus 4.5 in Coding › Web dev at #11 against #53.
Long context: As of Oct 14, 2026, Kimi K3 leads Claude Opus 4.5 in Long context at #8 against #19.
Factuality: As of Oct 14, 2026, Kimi K3 leads Claude Opus 4.5 in Factuality at #19 against #36.
Abstraction (ARC): As of Oct 14, 2026, Kimi K3 leads Claude Opus 4.5 in Abstraction (ARC) at #8 against #49.
Claude Opus 4.5 or Kimi K3?
As of Oct 14, 2026, Claude Opus 4.5 leads Kimi K3 in 0 of 7 shared categories.
Claude Opus 4.5 or Kimi K3 for General LLM?
As of Oct 14, 2026, Kimi K3 leads Claude Opus 4.5 in General LLM at #13 against #33.
Claude Opus 4.5 or Kimi K3 for Reasoning?
As of Oct 14, 2026, Kimi K3 leads Claude Opus 4.5 in Reasoning at #7 against #28.
Claude Opus 4.5 or Kimi K3 for Science?
As of Oct 14, 2026, Kimi K3 leads Claude Opus 4.5 in Science at #17 against #68.