Key Info

Kimi K3.1 Pro from Moonshot is now live on OpenRouter. It is a 1M-token context, multimodal open-weight model post-trained from Kimi K3 for long-horizon coding and agentic work, priced at $2/M input and $10/M output tokens.

Highlights

  • 1M-token context, 2.8T total / 104B active parameters (MoE), multimodal
  • Post-trained from Kimi K3 for long-horizon coding and agentic tasks; handles full-project coding in Unreal, Unity and Godot, parametric 3D modeling in Blender and CAD, and finance work
  • Moonshot reports 65.7% on Terminal-Bench 4.0, versus Claude Opus 5.5 at 66.4% and GPT-6 Astra at 58.2%
  • 61.2% on Kimi Code Bench 3.0 Long-horizon, up from K3's 55.95%
  • A Kimi K3.1 Pro Highspeed variant is also available: 2-3x faster at $4/M input and $20/M output, selectable from the providers list