Claude Opus 5.5 vs Kimi K2 Thinking Turbo
As of Oct 15, 2026, Claude Opus 5.5 leads Kimi K2 Thinking Turbo in 6 of 6 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, and Factuality.
Claude Opus 5.5
Yes. SOTA in co-SOTA in Reasoning, co-SOTA in Coding, co-SOTA in Coding › Agentic, Coding › Web dev, co-SOTA in Long context and co-SOTA in Factuality.
Kimi K2 Thinking Turbo
It used to be. Was SOTA in Coding › Web dev.
| Category | Claude Opus 5.5 | Kimi K2 Thinking Turbo |
|---|---|---|
| General LLM | #2 · Near-SOTA · General LLM Margin 1.3605442176870781 LMArena leaderboard dataset · Oct 13, 2026 | #81 · #81 in General LLM Margin 55.10204081632653 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #77 · #77 in Reasoning Margin 53.42465753424658 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 | #31 · #31 in Science Margin — Epoch AI benchmarking hub · Sep 22, 2026 | #60 · #60 in Science Margin — Epoch AI benchmarking hub · Nov 6, 2025 |
| Coding | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Agentic | #1 · Co-SOTA · Coding › Agentic Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #1 · SOTA · Coding › Web dev Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #94 · #94 in Coding › Web dev Margin 86.91588785046729 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #87 · #87 in Long context Margin 59.183673469387756 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #4 · Near-SOTA · Vision Margin 13.15789473684211 Epoch AI benchmarking hub · Sep 22, 2026 | — |
| Factuality | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #90 · #90 in Factuality Margin 67.91044776119404 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 22, 2026 | — |
Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.
Kimi K2 Thinking Turbo: price per 1M tokens is unset in the catalog.
Claude Opus 5.5: closed weights.
Kimi K2 Thinking Turbo: open weights.
General LLM: As of Oct 15, 2026, Claude Opus 5.5 leads Kimi K2 Thinking Turbo in General LLM at #2 against #81.
Reasoning: As of Oct 15, 2026, Claude Opus 5.5 leads Kimi K2 Thinking Turbo in Reasoning at #1 against #77.
Science: As of Oct 15, 2026, Claude Opus 5.5 leads Kimi K2 Thinking Turbo in Science at #31 against #60.
Coding › Web dev: As of Oct 15, 2026, Claude Opus 5.5 leads Kimi K2 Thinking Turbo in Coding › Web dev at #1 against #94.
Long context: As of Oct 15, 2026, Claude Opus 5.5 leads Kimi K2 Thinking Turbo in Long context at #1 against #87.
Factuality: As of Oct 15, 2026, Claude Opus 5.5 leads Kimi K2 Thinking Turbo in Factuality at #1 against #90.
Claude Opus 5.5 · Kimi K2 Thinking Turbo
Claude Opus 5.5 or Kimi K2 Thinking Turbo?
As of Oct 15, 2026, Claude Opus 5.5 leads Kimi K2 Thinking Turbo in 6 of 6 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, and Factuality.
Claude Opus 5.5 or Kimi K2 Thinking Turbo for General LLM?
As of Oct 15, 2026, Claude Opus 5.5 leads Kimi K2 Thinking Turbo in General LLM at #2 against #81.
Claude Opus 5.5 or Kimi K2 Thinking Turbo for Reasoning?
As of Oct 15, 2026, Claude Opus 5.5 leads Kimi K2 Thinking Turbo in Reasoning at #1 against #77.
Claude Opus 5.5 or Kimi K2 Thinking Turbo for Science?
As of Oct 15, 2026, Claude Opus 5.5 leads Kimi K2 Thinking Turbo in Science at #31 against #60.