GPT-5.5 vs Kimi K3
As of Oct 14, 2026, GPT-5.5 leads Kimi K3 in 3 of 8 shared categories: Vision, Factuality, and Abstraction (ARC).
GPT-5.5
It used to be. Was SOTA in General LLM.
Kimi K3
Yes. Yes on General LLM (open weights); Reasoning (open weights). Not the overall leader.
| Category | GPT-5.5 | Kimi K3 |
|---|---|---|
| General LLM | #21 · Was SOTA · General LLM Margin 14.285714285714292 LMArena leaderboard dataset · Oct 13, 2026 | #13 · #13 in General LLM Margin 8.84353741496598 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #25 · #25 in Reasoning Margin 17.808219178082197 LMArena leaderboard dataset · Oct 13, 2026 | #7 · #7 in Reasoning Margin 5.479452054794521 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 | #17 · #17 in Science Margin — Epoch AI benchmarking hub · Jul 16, 2026 |
| Coding | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — Scale Labs leaderboards · Oct 14, 2026 |
| Coding › Web dev | #44 · #44 in Coding › Web dev Margin 40.18691588785047 LMArena leaderboard dataset · Oct 13, 2026 | #11 · Was SOTA · Coding › Web dev Margin 9.34579439252336 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #23 · Was SOTA · Long context Margin 15.646258503401356 LMArena leaderboard dataset · Oct 13, 2026 | #8 · Was SOTA · Long context Margin 5.442176870748298 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #10 · Was SOTA · Vision Margin 28.94736842105263 Epoch AI benchmarking hub · Apr 23, 2026 | #22 · #22 in Vision Margin 60.526315789473685 Epoch AI benchmarking hub · Jul 16, 2026 |
| Factuality | #5 · Was SOTA · Factuality Margin 4.477611940298502 LMArena leaderboard dataset · Oct 13, 2026 | #19 · #19 in Factuality Margin 14.925373134328368 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #7 · #7 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Apr 23, 2026 | #8 · #8 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 16, 2026 |
GPT-5.5: $11.25 per 1M blended tokens.
Kimi K3: $4.125 per 1M blended tokens.
GPT-5.5: closed weights.
Kimi K3: open weights.
General LLM: As of Oct 14, 2026, Kimi K3 leads GPT-5.5 in General LLM at #13 against #21.
Reasoning: As of Oct 14, 2026, Kimi K3 leads GPT-5.5 in Reasoning at #7 against #25.
Science: As of Oct 14, 2026, Kimi K3 leads GPT-5.5 in Science at #17 against #30.
Coding › Web dev: As of Oct 14, 2026, Kimi K3 leads GPT-5.5 in Coding › Web dev at #11 against #44.
Long context: As of Oct 14, 2026, Kimi K3 leads GPT-5.5 in Long context at #8 against #23.
Vision: As of Oct 14, 2026, GPT-5.5 leads Kimi K3 in Vision at #10 against #22.
Factuality: As of Oct 14, 2026, GPT-5.5 leads Kimi K3 in Factuality at #5 against #19.
Abstraction (ARC): As of Oct 14, 2026, GPT-5.5 leads Kimi K3 in Abstraction (ARC) at #7 against #8.
GPT-5.5 or Kimi K3?
As of Oct 14, 2026, GPT-5.5 leads Kimi K3 in 3 of 8 shared categories: Vision, Factuality, and Abstraction (ARC).
GPT-5.5 or Kimi K3 for General LLM?
As of Oct 14, 2026, Kimi K3 leads GPT-5.5 in General LLM at #13 against #21.
GPT-5.5 or Kimi K3 for Reasoning?
As of Oct 14, 2026, Kimi K3 leads GPT-5.5 in Reasoning at #7 against #25.
GPT-5.5 or Kimi K3 for Science?
As of Oct 14, 2026, Kimi K3 leads GPT-5.5 in Science at #17 against #30.