Claude Opus 5 vs Kimi K2 0905 Preview
As of Oct 14, 2026, Claude Opus 5 leads Kimi K2 0905 Preview in 4 of 4 shared categories: General LLM, Reasoning, Long context, and Factuality.
Claude Opus 5
Close. Near-SOTA in Factuality, rank #4.
Kimi K2 0905 Preview
#93 Best current rank: #93 in General LLM, as of Oct 14, 2026.
| Category | Claude Opus 5 | Kimi K2 0905 Preview |
|---|---|---|
| General LLM | #11 · Was SOTA · General LLM Margin 7.482993197278915 LMArena leaderboard dataset · Oct 13, 2026 | #93 · #93 in General LLM Margin 63.265306122448976 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #9 · Was SOTA · Reasoning Margin 6.849315068493155 LMArena leaderboard dataset · Oct 13, 2026 | #94 · #94 in Reasoning Margin 65.06849315068493 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 | — |
| Coding | #4 · #4 in Coding Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Agentic | #4 · #4 in Coding › Agentic Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #6 · Was SOTA · Coding › Web dev Margin 4.672897196261687 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #9 · Was SOTA · Long context Margin 6.122448979591837 LMArena leaderboard dataset · Oct 13, 2026 | #115 · #115 in Long context Margin 78.2312925170068 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #12 · #12 in Vision Margin 36.8421052631579 Epoch AI benchmarking hub · Jul 24, 2026 | — |
| Factuality | #4 · Near-SOTA · Factuality Margin 3.731343283582092 LMArena leaderboard dataset · Oct 13, 2026 | #106 · #106 in Factuality Margin 79.85074626865672 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 24, 2026 | — |
Claude Opus 5: $10 per 1M blended tokens.
Kimi K2 0905 Preview: price per 1M tokens is unset in the catalog.
Claude Opus 5: closed weights.
Kimi K2 0905 Preview: open weights.
General LLM: As of Oct 14, 2026, Claude Opus 5 leads Kimi K2 0905 Preview in General LLM at #11 against #93.
Reasoning: As of Oct 14, 2026, Claude Opus 5 leads Kimi K2 0905 Preview in Reasoning at #9 against #94.
Long context: As of Oct 14, 2026, Claude Opus 5 leads Kimi K2 0905 Preview in Long context at #9 against #115.
Factuality: As of Oct 14, 2026, Claude Opus 5 leads Kimi K2 0905 Preview in Factuality at #4 against #106.
Claude Opus 5 · Kimi K2 0905 Preview
Claude Opus 5 or Kimi K2 0905 Preview?
As of Oct 14, 2026, Claude Opus 5 leads Kimi K2 0905 Preview in 4 of 4 shared categories: General LLM, Reasoning, Long context, and Factuality.
Claude Opus 5 or Kimi K2 0905 Preview for General LLM?
As of Oct 14, 2026, Claude Opus 5 leads Kimi K2 0905 Preview in General LLM at #11 against #93.
Claude Opus 5 or Kimi K2 0905 Preview for Reasoning?
As of Oct 14, 2026, Claude Opus 5 leads Kimi K2 0905 Preview in Reasoning at #9 against #94.
Claude Opus 5 or Kimi K2 0905 Preview for Long context?
As of Oct 14, 2026, Claude Opus 5 leads Kimi K2 0905 Preview in Long context at #9 against #115.