StepFun unveils STEPX Neo, a native AI agent phone entering production

StepFun, the Chinese AI company known for its STEP series of large language models, has officially unveiled the STEPX Neo — a smartphone built from the ground up with native AI agent capabilities. The product has already entered the production scheduling phase, according to a report from NetEase mobile channel.

The STEPX Neo is not a conventional smartphone with AI apps bolted on. Instead, it integrates large model capabilities directly into the operating system layer, making AI agent functionality a native component of the device rather than an add-on feature.

Entering the production scheduling phase is a significant milestone, indicating that the device has passed prototyping and validation and is moving toward mass production. This brings the product from concept to reality.

StepFun is best known for its family of STEP foundation models. The move into hardware represents a strategic expansion from the model layer into applications and devices, positioning the company to compete in the emerging AI-native device category.

AI-native phones are seen by many as the next frontier beyond traditional smartphones. By embedding AI at the system level, these devices promise deeper, more natural agent interactions — the phone understands context, anticipates needs, and executes tasks proactively.

The STEPX Neo launch comes at a time when multiple Chinese tech companies are racing to define the AI hardware form factor. StepFun's choice of the smartphone form factor gives it the advantage of an existing user paradigm, but also pits it against established smartphone giants.

Key questions ahead include the STEPX Neo's final specifications, pricing strategy, and availability timeline. The real-world performance of its AI agent capabilities — particularly response speed and accuracy in offline scenarios — will determine its market reception.