# GPT-5.5 vs Kimi K2 5 Thinking

As of Oct 14, 2026, GPT-5.5 leads Kimi K2 5 Thinking in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.

GPT-5.5: $11.25 per 1M blended tokens.

Kimi K2 5 Thinking: price per 1M tokens is unset in the catalog.

GPT-5.5: closed weights.

Kimi K2 5 Thinking: open weights.

- Which to pick, General LLM: As of Oct 14, 2026, GPT-5.5 leads Kimi K2 5 Thinking in General LLM at #21 against #56.
- Which to pick, Reasoning: As of Oct 14, 2026, GPT-5.5 leads Kimi K2 5 Thinking in Reasoning at #25 against #58.
- Which to pick, Coding › Web dev: As of Oct 14, 2026, GPT-5.5 leads Kimi K2 5 Thinking in Coding › Web dev at #44 against #61.
- Which to pick, Long context: As of Oct 14, 2026, GPT-5.5 leads Kimi K2 5 Thinking in Long context at #23 against #57.
- Which to pick, Factuality: As of Oct 14, 2026, GPT-5.5 leads Kimi K2 5 Thinking in Factuality at #5 against #58.

As of Oct 14, 2026, GPT-5.5 is a former state-of-the-art holder in General LLM (since Apr 28, 2026; sources LMArena Text (style-controlled, overall); methodology v1.0).

As of Oct 14, 2026, Kimi K2 5 Thinking is a former state-of-the-art holder in Coding › Web dev (since Mar 4, 2026; sources LMArena WebDev; methodology v1.0).