Claude Opus 5.5 vs Kimi K2 0711 Preview
As of Oct 14, 2026, Claude Opus 5.5 leads Kimi K2 0711 Preview in 3 of 3 shared categories: General LLM, Reasoning, and Long context.
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 0711 Preview
It used to be. Was SOTA in General LLM.
| Category | Claude Opus 5.5 | Kimi K2 0711 Preview |
|---|---|---|
| General LLM | #2 · Near-SOTA · General LLM Margin 1.3605442176870781 LMArena leaderboard dataset · Oct 13, 2026 | #94 · #94 in General LLM Margin 63.945578231292515 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #101 · #101 in Reasoning Margin 69.86301369863014 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 | — |
| 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 | — |
| Long context | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #127 · #127 in Long context Margin 86.39455782312925 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 | — |
| 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 0711 Preview: price per 1M tokens is unset in the catalog.
Claude Opus 5.5: closed weights.
Kimi K2 0711 Preview: open weights.
General LLM: As of Oct 14, 2026, Claude Opus 5.5 leads Kimi K2 0711 Preview in General LLM at #2 against #94.
Reasoning: As of Oct 14, 2026, Claude Opus 5.5 leads Kimi K2 0711 Preview in Reasoning at #1 against #101.
Long context: As of Oct 14, 2026, Claude Opus 5.5 leads Kimi K2 0711 Preview in Long context at #1 against #127.
Claude Opus 5.5 · Kimi K2 0711 Preview
Claude Opus 5.5 or Kimi K2 0711 Preview?
As of Oct 14, 2026, Claude Opus 5.5 leads Kimi K2 0711 Preview in 3 of 3 shared categories: General LLM, Reasoning, and Long context.
Claude Opus 5.5 or Kimi K2 0711 Preview for General LLM?
As of Oct 14, 2026, Claude Opus 5.5 leads Kimi K2 0711 Preview in General LLM at #2 against #94.
Claude Opus 5.5 or Kimi K2 0711 Preview for Reasoning?
As of Oct 14, 2026, Claude Opus 5.5 leads Kimi K2 0711 Preview in Reasoning at #1 against #101.
Claude Opus 5.5 or Kimi K2 0711 Preview for Long context?
As of Oct 14, 2026, Claude Opus 5.5 leads Kimi K2 0711 Preview in Long context at #1 against #127.