# Claude Opus 5.5 vs Kimi K2 6

As of Oct 15, 2026, Claude Opus 5.5 leads Kimi K2 6 in 6 of 7 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, Vision, and Factuality.

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

Kimi K2 6: $1.3399999999999999 per 1M blended tokens.

Claude Opus 5.5: closed weights.

Kimi K2 6: open weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Opus 5.5 leads Kimi K2 6 in General LLM at #2 against #40.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Opus 5.5 leads Kimi K2 6 in Reasoning at #1 against #38.
- Which to pick, Science: As of Oct 15, 2026, Kimi K2 6 leads Claude Opus 5.5 in Science at #29 against #31.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Opus 5.5 leads Kimi K2 6 in Coding › Web dev at #1 against #45.
- Which to pick, Long context: As of Oct 15, 2026, Claude Opus 5.5 leads Kimi K2 6 in Long context at #1 against #37.
- Which to pick, Vision: As of Oct 15, 2026, Claude Opus 5.5 leads Kimi K2 6 in Vision at #4 against #30.
- Which to pick, Factuality: As of Oct 15, 2026, Claude Opus 5.5 leads Kimi K2 6 in Factuality at #1 against #40.

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 6 is a former state-of-the-art holder in Coding › Web dev (since Jun 5, 2026; sources LMArena WebDev; methodology v1.0).