About
WALL is a family of embodied foundation models developed by X Square Robot (自变量机器人, Shenzhen). It includes the WALL-A operation model, the open-source vision-language-action model WALL-OSS (2025) with its extensions (WALL-OSS-0.5, WALL-WM) and the WALL-B model (2026) built on the World Unified Model architecture. The WALL models combine perception, language understanding, action control and physical prediction in an end-to-end approach, aiming at general-purpose robotic manipulation.
