# GPT-5.5 vs Kimi K2 5 Instant

As of Oct 14, 2026, GPT-5.5 leads Kimi K2 5 Instant 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 Instant: price per 1M tokens is unset in the catalog.

GPT-5.5: closed weights.

Kimi K2 5 Instant: open weights.

- Which to pick, General LLM: As of Oct 14, 2026, GPT-5.5 leads Kimi K2 5 Instant in General LLM at #21 against #80.
- Which to pick, Reasoning: As of Oct 14, 2026, GPT-5.5 leads Kimi K2 5 Instant in Reasoning at #25 against #71.
- Which to pick, Coding › Web dev: As of Oct 14, 2026, GPT-5.5 leads Kimi K2 5 Instant in Coding › Web dev at #44 against #71.
- Which to pick, Long context: As of Oct 14, 2026, GPT-5.5 leads Kimi K2 5 Instant in Long context at #23 against #78.
- Which to pick, Factuality: As of Oct 14, 2026, GPT-5.5 leads Kimi K2 5 Instant in Factuality at #5 against #85.

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 Instant is ranked #71 in Reasoning (since Oct 14, 2026; sources LMArena Text (style-controlled, hard prompts); methodology v1.0).