Fourier GR-2

Fourier Intelligence published control software and documentation for the GR-2 platform to enable third-party task development. The release included APIs for arm joint control, gripper actuation, and basic locomotion commands. Documentation covered the 7 DOF arm architecture and the torque-control interface used for manipulation task scripting.

Source code was made available through Fourier’s public repositories. The release covered low-level control interfaces and example task scripts; it did not include perception models, autonomous navigation code, or generalized manipulation reasoning. Developers working with the platform are expected to supply their own perception and task-planning layers.

Platform availability for research institutions was structured as a separate channel from any commercial product offering. Units were not available through consumer retail channels. Pricing for research access was not publicly disclosed in detail.

The SDK release clarified that the GR-2 control architecture is designed around scripted command sequences rather than reactive autonomous execution. This is consistent with the Level II Assisted Autonomy classification. Third-party researchers can extend the task library but cannot alter the fundamental scripted-operation architecture through software alone.

The GR-2 introduces a dual anthropomorphic arm configuration with 7 degrees of freedom per side, an increase in joint count and range relative to the GR-1. Each gripper is rated to approximately 2.5 kg payload per hand. The standing bipedal base is designed for flat factory flooring; staircase or uneven-surface locomotion specifications were not published at announcement.

Fourier Intelligence describes the GR-2 as using torque-controlled actuators throughout the arm and shoulder joints. Specific motor models, torque ratings, and joint speed limits were not disclosed in announcement materials. The torque-control architecture is consistent with Fourier’s published work on compliant humanoid manipulation.

Sensor suite specifications were not detailed at announcement. Industrial deployments described in manufacturer materials reference external vision infrastructure rather than standalone onboard perception. Autonomous environmental sensing capability remains undisclosed.

Battery capacity, runtime per charge, charge cycle time, and weight were not finalized in public materials at the September 2024 announcement. The 143 lb weight figure became available through later specification sheets.