StepX Neo Agentic Smartphone: StepFun Beats Apple and OpenAI to Launch First Mass-Market AI Phone
StepFun, a Shanghai-based AI startup backed by Tencent, has introduced the StepX Neo, a device the company calls the world's first mass-market StepX Neo agentic smartphone. Unveiled at a brand event in Shanghai on July 13, the phone signals a significant departure from how AI features have been integrated into mobile devices so far.
Rather than adding a chatbot or assistant layer to an existing operating system, the path taken by Apple Intelligence, Google's Gemini on Android, and Samsung's Galaxy AI, StepFun built the phone's software stack around its large language model from the start. The device runs Step AOS, a custom operating system reconstructed from Android, Linux, and real-time operating system (RTOS) components. This architecture gives the built-in AI agent direct access to system functions, allowing it to take actions rather than just answer questions.
What the StepX Neo Agentic Smartphone Can Do
The phone's AI assistant, called Amoo, is designed to handle complete workflows across multiple apps on behalf of the user. A single natural language request can trigger a sequence of actions. Booking a trip through Ctrip, paying via Alipay, and scheduling the itinerary into a calendar can all happen without the user manually switching between applications. StepFun says Amoo can recall context in 15 milliseconds, enabling fast, responsive task execution.
The intelligence powering these actions comes from Step Edge, StepFun's on-device foundation model, which the company claims ranks first across 29 benchmarks. For routine tasks, processing happens entirely on the hardware, meaning the device works even when offline. Complex operations route to the cloud. The phone also supports live translation in 32 languages.
Partners, Pricing, and Availability
StepFun has secured integrations with major Chinese digital platforms, including Alipay, WPS Office, CapCut, Baidu, JD.com, Ctrip, Didi Chuxing, and Meituan. This ecosystem of partners gives the StepX Neo agentic smartphone the ability to carry out real-world tasks rather than functioning as a closed demo system. However, the company has not announced pricing, full hardware specifications, or a launch timeline for the device.
The StepX Neo launch positions StepFun ahead of far larger competitors. OpenAI has been rumored to be developing its own AI hardware in collaboration with former Apple designer Jony Ive, but reports suggest that device is not expected until 2027. Apple has faced legal complications with its OpenAI partnership that have slowed its AI smartphone strategy. StepFun, a three-year-old company with no prior consumer hardware experience, has delivered a shipping product before either of those efforts reached the market.
StepFun was founded in 2023 by Jiang Daxin, a former Microsoft vice president. The company previously focused on developing foundation models and has now integrated vertically into operating systems and hardware. The StepX Neo agentic smartphone is its first consumer-facing product and a direct bet that agent-native smartphones will define the next phase of mobile computing.
Why This Matters
The StepX Neo challenges the assumption that meaningful AI integration in smartphones will come from the current market leaders. By shipping a device where the operating system is designed for the AI agent rather than for app icons, StepFun has introduced a new category that competitors will have to respond to. For consumers, the question is whether the agent-native approach delivers real convenience in daily use and at what price. Those answers will have to wait until StepFun reveals the full details of its launch plans.
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