Claude Opus 5 vs Kimi K3
As of Oct 15, 2026, Claude Opus 5 leads Kimi K3 in 6 of 8 shared categories: General LLM, Science, Coding › Web dev, Vision, Factuality, and Abstraction (ARC).
Claude Opus 5
Close. Near-SOTA in Factuality, rank #4.
Kimi K3
Yes. Yes on General LLM (open weights); Reasoning (open weights). Not the overall leader.
| Category | Claude Opus 5 | Kimi K3 |
|---|---|---|
| General LLM | #11 · Was SOTA · General LLM Margin 5.851063829787236 LMArena leaderboard dataset · Oct 13, 2026 | #13 · #13 in General LLM Margin 6.914893617021278 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #9 · Was SOTA · Reasoning Margin 5.319148936170208 LMArena leaderboard dataset · Oct 13, 2026 | #7 · #7 in Reasoning Margin 4.255319148936167 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 | #12 · #12 in Science Margin — Epoch AI benchmarking hub · Jul 24, 2026 | #17 · #17 in Science Margin — Epoch AI benchmarking hub · Jul 16, 2026 |
| Coding | #4 · #4 in Coding Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — Scale Labs leaderboards · Oct 14, 2026 |
| Coding › Agentic | #4 · #4 in Coding › Agentic Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #6 · Near-SOTA · Coding › Web dev Margin 4 LMArena leaderboard dataset · Oct 13, 2026 | #12 · Was SOTA · Coding › Web dev Margin 8.799999999999997 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #9 · Was SOTA · Long context Margin 4.7872340425531945 LMArena leaderboard dataset · Oct 13, 2026 | #8 · Was SOTA · Long context Margin 4.255319148936167 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #12 · #12 in Vision Margin 36.8421052631579 Epoch AI benchmarking hub · Jul 24, 2026 | #22 · #22 in Vision Margin 60.526315789473685 Epoch AI benchmarking hub · Jul 16, 2026 |
| Factuality | #4 · Near-SOTA · Factuality Margin 2.9069767441860535 LMArena leaderboard dataset · Oct 13, 2026 | #22 · #22 in Factuality Margin 13.372093023255815 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 24, 2026 | #8 · #8 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 16, 2026 |
Claude Opus 5: $10 per 1M blended tokens.
Kimi K3: $4.109999999999999 per 1M blended tokens.
Claude Opus 5: closed weights.
Kimi K3: open weights.
General LLM: As of Oct 15, 2026, Claude Opus 5 leads Kimi K3 in General LLM at #11 against #13.
Reasoning: As of Oct 15, 2026, Kimi K3 leads Claude Opus 5 in Reasoning at #7 against #9.
Science: As of Oct 15, 2026, Claude Opus 5 leads Kimi K3 in Science at #12 against #17.
Coding › Web dev: As of Oct 15, 2026, Claude Opus 5 leads Kimi K3 in Coding › Web dev at #6 against #12.
Long context: As of Oct 15, 2026, Kimi K3 leads Claude Opus 5 in Long context at #8 against #9.
Vision: As of Oct 15, 2026, Claude Opus 5 leads Kimi K3 in Vision at #12 against #22.
Factuality: As of Oct 15, 2026, Claude Opus 5 leads Kimi K3 in Factuality at #4 against #22.
Abstraction (ARC): As of Oct 15, 2026, Claude Opus 5 leads Kimi K3 in Abstraction (ARC) at #3 against #8.
Claude Opus 5 or Kimi K3?
As of Oct 15, 2026, Claude Opus 5 leads Kimi K3 in 6 of 8 shared categories: General LLM, Science, Coding › Web dev, Vision, Factuality, and Abstraction (ARC).
Claude Opus 5 or Kimi K3 for General LLM?
As of Oct 15, 2026, Claude Opus 5 leads Kimi K3 in General LLM at #11 against #13.
Claude Opus 5 or Kimi K3 for Reasoning?
As of Oct 15, 2026, Kimi K3 leads Claude Opus 5 in Reasoning at #7 against #9.
Claude Opus 5 or Kimi K3 for Science?
As of Oct 15, 2026, Claude Opus 5 leads Kimi K3 in Science at #12 against #17.