Moonshot AI open-sources Kimi K2.6 with Agent Swarm scaling to 300 sub-agents and 4,000 coordinated steps

Chinese AI lab Moonshot AI open-sourced Kimi K2.6, a multimodal model that matches Claude Opus 4.6 performance on key benchmarks including 54.0 on HLE with Tools, 58.6 on SWE-Bench Pro, and 83.2 on BrowseComp. The model's standout feature is Agent Swarm functionality, capable of spawning up to 300 sub-agents working in coordination across 4,000 steps for complex long-horizon coding and reasoning tasks.