STEPX Neo
StepFun's agent-first smartphone running Step AOS 1 and the Amoo agent, on sale in China from Oct 16 at RMB 3,999.
Overview
STEPX Neo is a smartphone from AI lab StepFun built around an OS-level agent rather than an app grid. It runs Step AOS 1, a mix of Android, Linux and real-time OS components, with a built-in agent called Amoo that keeps separate memories for user preferences and task-execution experience. Phone functions such as messaging, apps, files and settings are exposed to the agent through MCP; simple commands run on small on-device models, some offline, while complex cross-app requests go to cloud models. Pre-orders opened October 13 and first sales began October 16 via JD.com, Tmall and Douyin at RMB 3,999 (about $560), including a 12-month STEPX Token plan of 100 billion tokens per month. A secondary MiniLED screen on the back shows the agent's execution status.
This is a sourced directory entry. Features and capabilities are reported in the linked sources; this entry does not document independent Aymorphic testing.
Key features
- Step AOS 1 agent-native OS (Android, Linux and real-time OS components)
- Amoo agent with preference memory and task-execution memory
- Phone functions exposed to the agent via MCP
- On-device small models for simple commands, cloud models for cross-app tasks
- Rear MiniLED screen showing agent execution status
- Nearly 100 partner integrations reported, including Alipay, Tencent, Ctrip, DiDi and Meituan
Use cases
- Delegating multi-app tasks (travel, ride-hailing, payments) to an on-phone agent
- Offline simple voice and text commands on-device
- Evaluating agent-first mobile OS design
Pricing
RMB 3,999 (about $560) in China including a 12-month STEPX Token plan of 100B tokens per month; post-first-year AI cost undisclosed; no global release reported.
Pricing reflects the source record and may change. Confirm current terms with the provider.
Dates and sources
- Released
- 16 Oct 2026
- Record updated
- 26 Oct 2026
- Record last checked
- 26 Oct 2026