Kimi K2.6 Rewrote Legacy Code for 185% More Throughput

Kimi K2.6 is an open-source coding model release from Moonshot AI, published on April 20, 2026. According to Moonshot’s release blog, Kimi K2.6 is designed for long-horizon coding work: multi-hour tasks, repeated tool use, and autonomous code changes across large projects. The specific claim worth paying attention to is not just a benchmark score. Moonshot reports that Kimi K2.6 spent 13 hours rewriting parts of the open-source matching engine exchange-core , made more than 1,000 tool calls, cha