Claude Opus 4.1 vs Kimi K3
As of Oct 14, 2026, Claude Opus 4.1 leads Kimi K3 in 0 of 6 shared categories.
Claude Opus 4.1
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 Opus 4.1 | Kimi K3 |
|---|---|---|
| General LLM | #57 · Was SOTA · General LLM Margin 38.775510204081634 LMArena leaderboard dataset · Oct 13, 2026 | #13 · #13 in General LLM Margin 8.84353741496598 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #47 · Was SOTA · Reasoning Margin 32.87671232876713 LMArena leaderboard dataset · Oct 13, 2026 | #7 · #7 in Reasoning Margin 5.479452054794521 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #27 · #27 in Math Margin 57.77777777777778 Epoch AI benchmarking hub · Aug 5, 2025 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #83 · #83 in Science Margin — Epoch AI benchmarking hub · Aug 5, 2025 | #17 · #17 in Science Margin — Epoch AI benchmarking hub · Jul 16, 2026 |
| Coding | #— · Not enough data Margin — Epoch AI benchmarking hub · Aug 5, 2025 | #— · Not enough data Margin — Scale Labs leaderboards · Oct 14, 2026 |
| Coding › Web dev | #76 · Was SOTA · Coding › Web dev Margin 70.09345794392523 LMArena leaderboard dataset · Oct 13, 2026 | #11 · Was SOTA · Coding › Web dev Margin 9.34579439252336 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #44 · Was SOTA · Long context Margin 29.931972789115648 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 | #74 · #74 in Factuality Margin 55.97014925373134 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 4.1: $29.999999999999996 per 1M blended tokens.
Kimi K3: $4.125 per 1M blended tokens.
Claude Opus 4.1: closed weights.
Kimi K3: open weights.
General LLM: As of Oct 14, 2026, Kimi K3 leads Claude Opus 4.1 in General LLM at #13 against #57.
Reasoning: As of Oct 14, 2026, Kimi K3 leads Claude Opus 4.1 in Reasoning at #7 against #47.
Science: As of Oct 14, 2026, Kimi K3 leads Claude Opus 4.1 in Science at #17 against #83.
Coding › Web dev: As of Oct 14, 2026, Kimi K3 leads Claude Opus 4.1 in Coding › Web dev at #11 against #76.
Long context: As of Oct 14, 2026, Kimi K3 leads Claude Opus 4.1 in Long context at #8 against #44.
Factuality: As of Oct 14, 2026, Kimi K3 leads Claude Opus 4.1 in Factuality at #19 against #74.
Claude Opus 4.1 or Kimi K3?
As of Oct 14, 2026, Claude Opus 4.1 leads Kimi K3 in 0 of 6 shared categories.
Claude Opus 4.1 or Kimi K3 for General LLM?
As of Oct 14, 2026, Kimi K3 leads Claude Opus 4.1 in General LLM at #13 against #57.
Claude Opus 4.1 or Kimi K3 for Reasoning?
As of Oct 14, 2026, Kimi K3 leads Claude Opus 4.1 in Reasoning at #7 against #47.
Claude Opus 4.1 or Kimi K3 for Science?
As of Oct 14, 2026, Kimi K3 leads Claude Opus 4.1 in Science at #17 against #83.