StepFun launches $549 agent-native phone STEP X Neo with system-level tool calls and 12-month token plan
量子位 · wechat · 2026-10-14
StepFun's device arm officially launched STEP X Neo, an agent-native smartphone at 3,999 yuan bundled with 12 months of 10-billion-token monthly plans. Its StepAOS OS natively supports loop execution, autonomous tool calls, and Skill/MCP invocation — the Amoo agent is a system resident rather than a GUI-overlay click simulator; a rear screen shows live agent states like "thinking" and "ToolCall."
Key points:
- Dual entry: swipe right into Amoo's system space, left for a normal desktop; a persistent bottom panel tracks long-horizon agent tasks with proactive completion pushes.
- Ecosystem: high-frequency services pre-wrapped as system Skills, third-party access via H2A2A and MCP; community Skills/Agents installable.
- Development: StepStudio is a native AI dev workspace where writing a SKILL.MD glues agents, external APIs and phone capabilities, with direct on-device install from cloud preview.
- Security: a dedicated agent-security module offers data masking before upload, full audit trails, mandatory confirmation for payments/deletions, reversible recovery, publisher real-name verification, and automatic blocking of uploads containing .env or key files.
- The first 10,000 users who complete tasks get a voucher to swap for any future STEP X device free within five years.
The review frames it in Alan Kay's "serious software should make its own hardware" tradition — vertical integration as the way to box uncertain agents into safe, controllable form.
Related event: StepFun Launches STEPX Neo, Its First AI Agent Phone, at 3999 Yuan(5 posts)→
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