The TWIML AI Podcast (formerly This Week in Machine Learning & Artificial Intelligence)

π0: A Foundation Model for Robotics with Sergey Levine - #719


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Today, we're joined by Sergey Levine, associate professor at UC Berkeley and co-founder of Physical Intelligence, to discuss π0 (pi-zero), a general-purpose robotic foundation model. We dig into the model architecture, which pairs a vision language model (VLM) with a diffusion-based action expert, and the model training "recipe," emphasizing the roles of pre-training and post-training with a diverse mixture of real-world data to ensure robust and intelligent robot learning. We review the data collection approach, which uses human operators and teleoperation rigs, the potential of synthetic data and reinforcement learning in enhancing robotic capabilities, and much more. We also introduce the team’s new FAST tokenizer, which opens the door to a fully Transformer-based model and significant improvements in learning and generalization. Finally, we cover the open-sourcing of π0 and future directions for their research.


The complete show notes for this episode can be found at https://twimlai.com/go/719.

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The TWIML AI Podcast (formerly This Week in Machine Learning & Artificial Intelligence)By Sam Charrington

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