Former Feishu VP pulls the plug on startup in under 3 months; Shi Kaiwen reportedly joins StepFun to lead Agent OS.

Beating AI News Flash: Former Feishu Product Vice President Shi Kaiwen has been reported to have joined StepFun as a partner, reporting directly to Chairman Yin Qi, and is responsible for the Agent OS (agent operating system) direction. This news first circulated in mid-September, and the original report was subsequently deleted; StepFun has so far not publicly confirmed it.

Shi Kaiwen left Feishu at the end of June this year and planned to start a business building on-device agents, with team members from ByteDance and Shanghai Jiao Tong University. Sequoia China and Jinqiu Fund were once reported to have participated in early investment, and the project valuation was rumored to be as high as $500 million. But in less than 3 months, media reported that he had terminated the startup and instead chose to join a large-model company.

In January this year, Yin Qi became chairman of StepFun; in July, StepFun launched the agent operating system Step AOS, the personal agent Amoo, and the STEPX Neo phone; in October, the phone officially went on sale at a price of RMB 3,999. Shi Kaiwen previously participated deeply in the product development of Feishu Bitable and is skilled at turning complex enterprise collaboration capabilities into products that ordinary users can use. Now, he may bring this experience to phone agents, enabling AI to move from understanding instructions to actual operation.