Physical Intelligence open-sources π0 model weights and code as openpi

Physical Intelligence/π model family

Physical Intelligence released π0 and π0-FAST model weights and code in the openpi repository, with checkpoints pre-tuned for common research robots. The company found that 1–20 hours of robot-specific data suffice to adapt π0 to new tasks, making a leading robot model available for third-party development.

• openpi repository provides π0, π0-FAST (autoregressive variant), and π0.5 (upgraded with better open-world generalization).
• Pre-tuned checkpoints available for research platforms such as ALOHA and DROID.
• Only 1–20 hours of robot-specific data needed to fine-tune π0 for new tasks.
• Enables broad third-party experimentation with a leading vision-language-action foundation model.