StepFun Unveils Agent Phone and StepAOS

APPSO · wechat · 2026-07-14

StepFun has released its first agent phone, STEPXNeo, alongside the terminal brand STEPX, the agent OS StepAOS, and the main agent Amoo. The article emphasizes this isn't just bolting an AI gateway onto an old mobile OS, but an attempt to evolve AI from a "system guest" into a "native resident."

The core philosophy deeply integrates a model matrix, memory, planning, connectivity, and execution with the OS, reinventing the terminal experience around continuous agent context and cross-app actions. The system supports protocols like MCP, A2A, and CLI, employing dynamic routing across on-device, cloud, and device-cloud relays to balance low latency, privacy, and complex task handling.

The article also touches on governance and business models: StepFun proposes "trustworthy, manageable, visible, and reversible," releasing a related security whitepaper with Shanghai Jiao Tong University's AI Research Institute. Commercially, it aims beyond hardware sales, preloads, or ad revenue, actively exploring models involving terminals, systems, model invocations, and ecosystem sharing.

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