PrimeBOT T1 (Qiyuan T1; nicknamed '远仔') was unveiled by PrimeBOT in July 2026 as the world's first transformable personal robot. Its unified, integrated 'Transformer' architecture lets a single body take two forms: indoors it moves quietly as a wheel-leg (轮足) humanoid, and outdoors it switches to a quadruped (四足). The robot senses terrain and switches gait automatically, and before transforming it scans the ground and obstacles, performing the change only once safety is confirmed.

In quadruped form, T1 runs at up to 10 km/h (gradually increased via OTA updates), climbs slopes up to 30°, crosses obstacles up to 15 cm, and moves across grass, gravel and steps. In wheel-leg form it turns in place and maneuvers smoothly in tight interiors thanks to S-curve speed planning and quiet, compliant control. Low-reduction-ratio, high-response joints plus reinforcement-learning and simulation training provide stable, natural motion.

T1 perceives its surroundings over 360°: it integrates 5 ToF depth modules, a stereo camera and two fisheye cameras (each sensor: 120° horizontal, 90° vertical). It can follow the user (face recognition, voiceprint and body tracking), climb stairs on voice command, and perform demonstration moves (dancing, moonwalk, and a backflip via OTA). A mixture-of-experts RL stack (base motion, compliance, safety) lets the robot respond to external forces and stop immediately if tipped over or lifted.

Its interaction layer combines vision, speech and touch, proactive interaction (initiating conversations based on time, scene and behavior), long-term memory, and face and voiceprint recognition. The robot's personality can be defined on an open secondary-creation platform. T1 also supports learning (conversation practice, homework help), entertainment, video calls and mobile recording with follow and camera-move modes.