Kimi K2.6 Review: Moonshot AI's Open-Weight Trillion-Parameter Agent — Agent Swarm, MLA Attention, 80.2% SWE-Bench

Kimi K2.6 (April 20, 2026) is Moonshot AI's open-weight flagship: 1 trillion total parameters, 32B active (MoE), Multi-head Latent Attention enabling 256K context on commodity hardware, native video multimodal, and an Agent Swarm architecture that coordinates up to 300 domain-specialized sub-agents across 4,000 steps. We review the architecture, benchmark claims, Agent Swarm capabilities, pricing, controversies, and whether K2.6 earns its 'world's leading open-weight model' headline.