# Claude Opus 5.5 vs Kimi K2 5 Instant

As of Oct 15, 2026, Claude Opus 5.5 leads Kimi K2 5 Instant in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.

Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.

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

Claude Opus 5.5: closed weights.

Kimi K2 5 Instant: open weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Opus 5.5 leads Kimi K2 5 Instant in General LLM at #2 against #103.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Opus 5.5 leads Kimi K2 5 Instant in Reasoning at #1 against #89.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Opus 5.5 leads Kimi K2 5 Instant in Coding › Web dev at #1 against #77.
- Which to pick, Long context: As of Oct 15, 2026, Claude Opus 5.5 leads Kimi K2 5 Instant in Long context at #1 against #95.
- Which to pick, Factuality: As of Oct 15, 2026, Claude Opus 5.5 leads Kimi K2 5 Instant in Factuality at #1 against #107.

As of Oct 15, 2026, Claude Opus 5.5 is tied for state of the art in Reasoning (since Oct 2, 2026; sources LMArena Text (style-controlled, hard prompts); methodology v1.0).

As of Oct 15, 2026, Kimi K2 5 Instant is ranked #77 in Coding › Web dev (since Oct 15, 2026; sources LMArena WebDev; methodology v1.0).