AI2 Open-Sources MolmoAct2: Robotics VLA That Claims to Beat GPT-5 on Embodied Reasoning

Allen Institute for AI releases MolmoAct2, an open-source robotic control system built around MolmoER, a vision-language model trained on 3.3M samples for spatial reasoning. The release includes three new datasets — including the largest open bimanual dataset to date with 720 hours of teleoperated trajectories — an open-source action tokenizer (OpenFAST), and MolmoThink, an adaptive reasoning mechanism that re-predicts depth tokens only for changed scene regions to reduce latency. Full model weights, training code, and datasets are released publicly.