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

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 for Long context

Top 10

Ranks

  1. #1 Kimi K3
  2. #1 Mimo V2.6 Pro
  3. #2 Mimo V2.5 Pro
  4. #3 GLM 5.2
  5. #4 GLM 5.3
  6. #5 GLM 5.3 Flash
  7. #6 DeepSeek V4.1 Flash
  8. #7 GLM 5.1
  9. #8 Kimi K2 6
  10. #9 DeepSeek V4 Pro High
Recent crowns

Last 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

Which benchmarks count

Who is SOTA in Long context, open weights?

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).

Since when is the Long context, open weights crown current?

The current crown in Long context, open weights has held since Oct 13, 2026.