Claude Opus 4.6 vs Kimi K3
As of Oct 14, 2026, Claude Opus 4.6 leads Kimi K3 in 4 of 6 shared categories: General LLM, Reasoning, Long context, and Factuality.
Claude Opus 4.6
Close. Near-SOTA in Reasoning, rank #2.
Kimi K3
Yes. Yes on General LLM (open weights); Reasoning (open weights). Not the overall leader.
| Category | Claude Opus 4.6 | Kimi K3 |
|---|---|---|
| General LLM | #4 · Near-SOTA · General LLM Margin 2.7210884353741562 LMArena leaderboard dataset · Oct 13, 2026 | #13 · #13 in General LLM Margin 8.84353741496598 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #2 · Near-SOTA · Reasoning Margin 2.0547945205479436 LMArena leaderboard dataset · Oct 13, 2026 | #7 · #7 in Reasoning Margin 5.479452054794521 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #11 · #11 in Math Margin 22.22222222222223 Epoch AI benchmarking hub · Feb 5, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #32 · #32 in Science Margin — Epoch AI benchmarking hub · Feb 5, 2026 | #17 · #17 in Science Margin — Epoch AI benchmarking hub · Jul 16, 2026 |
| Coding | #— · Not enough data Margin — Epoch AI benchmarking hub · Feb 5, 2026 | #— · Not enough data Margin — Scale Labs leaderboards · Oct 14, 2026 |
| Coding › Web dev | #35 · Was SOTA · Coding › Web dev Margin 31.775700934579433 LMArena leaderboard dataset · Oct 13, 2026 | #11 · Was SOTA · Coding › Web dev Margin 9.34579439252336 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #2 · Near-SOTA · Long context Margin 0.6802721088435391 LMArena leaderboard dataset · Oct 13, 2026 | #8 · Was SOTA · Long context Margin 5.442176870748298 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | #22 · #22 in Vision Margin 60.526315789473685 Epoch AI benchmarking hub · Jul 16, 2026 |
| Factuality | #3 · Near-SOTA · Factuality Margin 2.9850746268656536 LMArena leaderboard dataset · Oct 13, 2026 | #19 · #19 in Factuality Margin 14.925373134328368 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | — | #8 · #8 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 16, 2026 |
Claude Opus 4.6: $10 per 1M blended tokens.
Kimi K3: $4.125 per 1M blended tokens.
Claude Opus 4.6: closed weights.
Kimi K3: open weights.
General LLM: As of Oct 14, 2026, Claude Opus 4.6 leads Kimi K3 in General LLM at #4 against #13.
Reasoning: As of Oct 14, 2026, Claude Opus 4.6 leads Kimi K3 in Reasoning at #2 against #7.
Science: As of Oct 14, 2026, Kimi K3 leads Claude Opus 4.6 in Science at #17 against #32.
Coding › Web dev: As of Oct 14, 2026, Kimi K3 leads Claude Opus 4.6 in Coding › Web dev at #11 against #35.
Long context: As of Oct 14, 2026, Claude Opus 4.6 leads Kimi K3 in Long context at #2 against #8.
Factuality: As of Oct 14, 2026, Claude Opus 4.6 leads Kimi K3 in Factuality at #3 against #19.
Claude Opus 4.6 or Kimi K3?
As of Oct 14, 2026, Claude Opus 4.6 leads Kimi K3 in 4 of 6 shared categories: General LLM, Reasoning, Long context, and Factuality.
Claude Opus 4.6 or Kimi K3 for General LLM?
As of Oct 14, 2026, Claude Opus 4.6 leads Kimi K3 in General LLM at #4 against #13.
Claude Opus 4.6 or Kimi K3 for Reasoning?
As of Oct 14, 2026, Claude Opus 4.6 leads Kimi K3 in Reasoning at #2 against #7.
Claude Opus 4.6 or Kimi K3 for Science?
As of Oct 14, 2026, Kimi K3 leads Claude Opus 4.6 in Science at #17 against #32.