Hacker News discussion: US lawmakers investigate DoorDash's use of Moonshot AI's Kimi K2.6 model

US lawmakers are investigating DoorDash's use of Moonshot AI's Kimi K2.6 model, highlighting escalating scrutiny over American companies adopting Chinese AI models for cost savings. House Select Committee on China chairman John Moolenaar and House Homeland Security chairman Andrew Garbarino sent a letter to CEO Tony Xu demanding by August 14 a list of all Chinese models DoorDash uses and details of any security testing, plus an in-person staff briefing by August 21. The lawmakers acknowledged that Chinese open-weight models offer competitive capabilities, lower costs, and customization, but argued those practical benefits do not override the need for risk-based safeguards or national security concerns about dependence on PRC-developed AI. The development matters because it illustrates the regulatory friction as US businesses increasingly turn to advanced Chinese AI tools, forcing a reckoning between commercial expediency and geopolitical risk management.