ChainCatcher report: StepFun, an AI startup backed by Tencent, has launched the STEPX Neo smartphone, featuring an AI agent natively integrated into the operating system rather than as an external app. Pre-orders began on the evening of October 13 at a price of RMB 3,999 (approximately $560), with first sales starting on October 16 via JD.com, Tmall, and Douyin. Users no longer need to open ride-hailing apps, enter destinations, or select vehicles—simply state your destination, and the AI agent will autonomously complete all subsequent steps. At the launch event, StepFun stated that in the age of AI agents, AI is no longer an add-on feature for smartphones but the product itself. The device runs Step AOS 1, a system designed from the ground up for AI agents, featuring long-term memory, task orchestration, and security controls, built from a hybrid of Android, Linux, and real-time operating system components. The system uses the MCP protocol to decompose functions such as messages, apps, files, and settings into small modules directly accessible by AI agents, offering users two entry points: the traditional app grid and the AI agent workspace. The AI agent is named Amoo, which maintains two types of memory: user factual preferences and task execution experience. Simple commands are processed by on-device small models, some of which can operate offline; complex cross-app requests are handled by cloud-based large models. A secondary MiniLED screen on the back displays Amoo’s execution status. Nearly 100 companies and products—including Alipay, Tencent, Ctrip, DiDi, and Meituan—have integrated with Amoo. Payments, travel bookings, and content creation continue to be handled by their respective platforms, representing StepFun’s alternative approach to ByteDance’s Doubao, which previously faced blocking due to its screen-reading and simulated-click methods. StepFun was founded in 2023 by former Microsoft vice president Jiang Daxin. Its self-developed flagship large model, Step 5 Preview, was released in September with 600 billion parameters and 27 billion active parameters per inference, supporting up to 1 million tokens of context. Earlier this year, Step 3.5 Flash was open-sourced under the Apache 2.0 license. The RMB 3,999 price includes a 12-month STEPX Token plan, providing 100 billion tokens per month; AI costs after the first year have not yet been disclosed.
STEPX Neo Phone Launches with Built-in AI Agent by StepFun
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Summary
StepFun, a Tencent-backed AI startup, has launched the STEPX Neo smartphone with an AI agent embedded in the operating system. Priced at 3,999 CNY, the device began pre-sales on October 13 and ships on October 16. It runs Step AOS 1, an AI-focused operating system, and features a secondary MiniLED screen to display agent status. Over 100 companies, including Alipay and Tencent, have integrated with the AI agent Amoo, which leverages on-chain data to distribute tasks between on-device and cloud-based models.
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