# Claude Sonnet 5.5 vs Kimi K3

As of Oct 15, 2026, Claude Sonnet 5.5 leads Kimi K3 in 4 of 7 shared categories: Science, Coding › Web dev, Vision, and Factuality.

Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.

Kimi K3: $4.109999999999999 per 1M blended tokens.

Claude Sonnet 5.5: closed weights.

Kimi K3: open weights.

- Which to pick, General LLM: As of Oct 15, 2026, Kimi K3 leads Claude Sonnet 5.5 in General LLM at #13 against #29.
- Which to pick, Reasoning: As of Oct 15, 2026, Kimi K3 leads Claude Sonnet 5.5 in Reasoning at #7 against #18.
- Which to pick, Science: As of Oct 15, 2026, Claude Sonnet 5.5 leads Kimi K3 in Science at #3 against #17.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Sonnet 5.5 leads Kimi K3 in Coding › Web dev at #3 against #12.
- Which to pick, Long context: As of Oct 15, 2026, Kimi K3 leads Claude Sonnet 5.5 in Long context at #8 against #11.
- Which to pick, Vision: As of Oct 15, 2026, Claude Sonnet 5.5 leads Kimi K3 in Vision at #1 against #22.
- Which to pick, Factuality: As of Oct 15, 2026, Claude Sonnet 5.5 leads Kimi K3 in Factuality at #17 against #22.

As of Oct 15, 2026, Claude Sonnet 5.5 is tied for state of the art in Coding (since Oct 6, 2026; sources Terminal-Bench 4.0; methodology v1.0).

As of Oct 15, 2026, Kimi K3 is tied for state of the art in General LLM (since Oct 13, 2026; sources LMArena Text (style-controlled, overall); methodology v1.0).