pi-0.5
Open-weight VLA policies that transfer across robot embodiments and novel homes.
Full pi-0.5 record →Head to head
pi-0.5 vs ROS 2
pi-0.5 (Physical Intelligence) and ROS 2 (Open Robotics) both sit in Robotics. ROS 2 shipped more tracked changes in the last 30 days (9 vs 0). Every value below comes from the latest crawl of the vendors' own pages.
| Attribute | pi-0.5 Physical Intelligence | ROS 2 Open Robotics |
|---|---|---|
| Segment | Robotics | Robotics |
| Version | pi-0.5 | 2 |
| Entry cost | Free and open-source model weights and code (Apache-2.0) | Free and open source robotics middleware. |
| Pricing tiers | Open Source free | Open Source / Free free |
| Model stack | pi-0.5 · pi-0.5-droid · pi-0.5-libero · pi05_base · π₀-FAST | DDS (Fast/Cyclone) |
| Context window | — | — |
| Public API | ||
| Routes models | ||
| Changes / 30d | 0 | 9 |
| Origin | Global | Global |
| Capabilities | cross-embodiment transfer, open-world generalisation, open checkpoints, vision-language-action model (VLA), open-world generalization, knowledge insulation, flow matching, robotics control | DDS middleware, Nav2, MoveIt 2, 5-year LTS, robotics middleware, robot operating system, open source, open-source |
ROS 2
DDS-based middleware, navigation and manipulation stacks under annual LTS releases.
Full ROS 2 record →