# Best open-weights AI model for long context — October 2026

As of Oct 14, 2026, Kimi K3 & Mimo V2.6 Pro are tied for state of the art in Long context, open weights (since Oct 13, 2026; sources LMArena Text (style-controlled, longer query); methodology v1.0).

Category board: https://isitsota.com/c/long-context?slice=open-weights

## Top 10

- #1 Kimi K3
- #1 Mimo V2.6 Pro
- #2 Mimo V2.5 Pro
- #3 GLM 5.2
- #4 GLM 5.3
- #5 GLM 5.3 Flash
- #6 DeepSeek V4.1 Flash
- #7 GLM 5.1
- #8 Kimi K2 6
- #9 DeepSeek V4 Pro High

## Crown changes

- Oct 13, 2026 — Long context: Kimi K3 and Mimo V2.6 Pro are co-SOTA
- Jul 20, 2026 — Long context: Kimi K3 takes the crown
- Apr 9, 2026 — Long context: GLM 5.1 takes the crown

## Weights

- Fiction.liveBench 120k: primary, weight 1
- LMArena Text (style-controlled, longer query): primary, weight 0.7