LeRobot Launches Zero-Shot Reward Model API
RemiCadene · x · 2026-07-13
LeRobot v0.6.0 introduces a unified reward models API designed to determine the success of robotic tasks.
It primarily features two zero-shot approaches:
- Robometer: A general-purpose reward model trained on over 1 million trajectories across 21 robot morphologies. By taking video and language instructions from a LeRobot dataset as input, it can directly score task progress and success without needing task-specific retraining.
- TOPReward: Takes it a step further by eliminating the need for any reward weights. It simply wraps an off-the-shelf VLM and reads the log probability of the “True” token under a given video and instruction to assess the outcome.
Additionally, both solutions come with annotation scripts that can write frame-by-frame progress curves back into the dataset, facilitating future reward-aware behavior cloning.
Related event: LeRobot v0.6 Adds Zero-Shot Reward Model API(2 posts)→
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