GPT-5.5 vs Kimi K2 0905 Preview
As of Oct 14, 2026, GPT-5.5 leads Kimi K2 0905 Preview in 4 of 4 shared categories: General LLM, Reasoning, Long context, and Factuality.
GPT-5.5
It used to be. Was SOTA in General LLM.
Kimi K2 0905 Preview
#93 Best current rank: #93 in General LLM, as of Oct 14, 2026.
| Category | GPT-5.5 | Kimi K2 0905 Preview |
|---|---|---|
| General LLM | #21 · Was SOTA · General LLM Margin 14.285714285714292 LMArena leaderboard dataset · Oct 13, 2026 | #93 · #93 in General LLM Margin 63.265306122448976 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #25 · #25 in Reasoning Margin 17.808219178082197 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 | #30 · #30 in Science Margin — Epoch AI benchmarking hub · Apr 23, 2026 | — |
| Coding | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Web dev | #44 · #44 in Coding › Web dev Margin 40.18691588785047 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #23 · Was SOTA · Long context Margin 15.646258503401356 LMArena leaderboard dataset · Oct 13, 2026 | #115 · #115 in Long context Margin 78.2312925170068 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #10 · Was SOTA · Vision Margin 28.94736842105263 Epoch AI benchmarking hub · Apr 23, 2026 | — |
| Factuality | #5 · Was SOTA · Factuality Margin 4.477611940298502 LMArena leaderboard dataset · Oct 13, 2026 | #106 · #106 in Factuality Margin 79.85074626865672 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #7 · #7 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Apr 23, 2026 | — |
GPT-5.5: $11.25 per 1M blended tokens.
Kimi K2 0905 Preview: price per 1M tokens is unset in the catalog.
GPT-5.5: closed weights.
Kimi K2 0905 Preview: open weights.
General LLM: As of Oct 14, 2026, GPT-5.5 leads Kimi K2 0905 Preview in General LLM at #21 against #93.
Reasoning: As of Oct 14, 2026, GPT-5.5 leads Kimi K2 0905 Preview in Reasoning at #25 against #94.
Long context: As of Oct 14, 2026, GPT-5.5 leads Kimi K2 0905 Preview in Long context at #23 against #115.
Factuality: As of Oct 14, 2026, GPT-5.5 leads Kimi K2 0905 Preview in Factuality at #5 against #106.
GPT-5.5 · Kimi K2 0905 Preview
GPT-5.5 or Kimi K2 0905 Preview?
As of Oct 14, 2026, GPT-5.5 leads Kimi K2 0905 Preview in 4 of 4 shared categories: General LLM, Reasoning, Long context, and Factuality.
GPT-5.5 or Kimi K2 0905 Preview for General LLM?
As of Oct 14, 2026, GPT-5.5 leads Kimi K2 0905 Preview in General LLM at #21 against #93.
GPT-5.5 or Kimi K2 0905 Preview for Reasoning?
As of Oct 14, 2026, GPT-5.5 leads Kimi K2 0905 Preview in Reasoning at #25 against #94.
GPT-5.5 or Kimi K2 0905 Preview for Long context?
As of Oct 14, 2026, GPT-5.5 leads Kimi K2 0905 Preview in Long context at #23 against #115.