Claude Opus 4.8 vs Kimi K2 0905 Preview
As of Oct 14, 2026, Claude Opus 4.8 leads Kimi K2 0905 Preview in 4 of 4 shared categories: General LLM, Reasoning, Long context, and Factuality.
Claude Opus 4.8
It used to be. Was SOTA in Coding › Web dev.
Kimi K2 0905 Preview
#93 Best current rank: #93 in General LLM, as of Oct 14, 2026.
| Category | Claude Opus 4.8 | Kimi K2 0905 Preview |
|---|---|---|
| General LLM | #20 · #20 in General LLM Margin 13.605442176870753 LMArena leaderboard dataset · Oct 13, 2026 | #93 · #93 in General LLM Margin 63.265306122448976 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #10 · #10 in Reasoning Margin 7.534246575342465 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 | #27 · #27 in Science Margin — Epoch AI benchmarking hub · May 28, 2026 | — |
| Coding | #12 · #12 in Coding Margin 59.09090909090909 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Agentic | #12 · #12 in Coding › Agentic Margin 59.09090909090909 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #33 · Was SOTA · Coding › Web dev Margin 29.90654205607477 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #10 · Was SOTA · Long context Margin 6.802721088435391 LMArena leaderboard dataset · Oct 13, 2026 | #115 · #115 in Long context Margin 78.2312925170068 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #13 · #13 in Vision Margin 36.842105263157904 Epoch AI benchmarking hub · May 28, 2026 | — |
| Factuality | #21 · #21 in Factuality Margin 16.417910447761187 LMArena leaderboard dataset · Oct 13, 2026 | #106 · #106 in Factuality Margin 79.85074626865672 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #12 · #12 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · May 28, 2026 | — |
Claude Opus 4.8: $10 per 1M blended tokens.
Kimi K2 0905 Preview: price per 1M tokens is unset in the catalog.
Claude Opus 4.8: closed weights.
Kimi K2 0905 Preview: open weights.
General LLM: As of Oct 14, 2026, Claude Opus 4.8 leads Kimi K2 0905 Preview in General LLM at #20 against #93.
Reasoning: As of Oct 14, 2026, Claude Opus 4.8 leads Kimi K2 0905 Preview in Reasoning at #10 against #94.
Long context: As of Oct 14, 2026, Claude Opus 4.8 leads Kimi K2 0905 Preview in Long context at #10 against #115.
Factuality: As of Oct 14, 2026, Claude Opus 4.8 leads Kimi K2 0905 Preview in Factuality at #21 against #106.
Claude Opus 4.8 · Kimi K2 0905 Preview
Claude Opus 4.8 or Kimi K2 0905 Preview?
As of Oct 14, 2026, Claude Opus 4.8 leads Kimi K2 0905 Preview in 4 of 4 shared categories: General LLM, Reasoning, Long context, and Factuality.
Claude Opus 4.8 or Kimi K2 0905 Preview for General LLM?
As of Oct 14, 2026, Claude Opus 4.8 leads Kimi K2 0905 Preview in General LLM at #20 against #93.
Claude Opus 4.8 or Kimi K2 0905 Preview for Reasoning?
As of Oct 14, 2026, Claude Opus 4.8 leads Kimi K2 0905 Preview in Reasoning at #10 against #94.
Claude Opus 4.8 or Kimi K2 0905 Preview for Long context?
As of Oct 14, 2026, Claude Opus 4.8 leads Kimi K2 0905 Preview in Long context at #10 against #115.