{"schema":"postcutoff/model@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/m/pi-0-5/","md":"https://postcutoff.com/m/pi-0-5/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"id":"pi-0-5","name":"π0.5","org":"Physical Intelligence","family":"π (pi)","released":"2025-04-22","status":"current","type":"robotics","modality_in":["text","image"],"modality_out":["action","text"],"open_weights":true,"model_license":"apache-2.0 (openpi code); weights built on PaliGemma, Gemma terms apply","context_window":null,"max_output":null,"knowledge_cutoff":null,"pricing":null,"price_line":"Price not published","access":[{"provider":"GitHub (openpi, JAX + PyTorch)","url":"https://github.com/Physical-Intelligence/openpi","model_id":"gs://openpi-assets/checkpoints/pi05_base"},{"provider":"Hugging Face (LeRobot port)","url":"https://huggingface.co/lerobot/pi05_base","model_id":"lerobot/pi05_base","docs":"https://huggingface.co/docs/lerobot/en/pi05"}],"capabilities":[{"name":"Open-world generalization to unseen homes","detail":"Cleans kitchens and bedrooms in entirely new homes not in training; performance improved as training grew from 3 to 104 homes; co-trained on heterogeneous robot, web and verbal-instruction data.","first":false,"discovered":"launch","source":"https://www.pi.website/blog/pi05"},{"name":"Hierarchical subtask prediction + actions in one model","detail":"Predicts a high-level text subtask, then low-level actions; trained with knowledge insulation.","first":false,"discovered":"launch","source":"https://github.com/Physical-Intelligence/openpi"},{"name":"Newest open-weights π model","detail":"Base plus LIBERO and DROID checkpoints released in openpi in September 2025; the latest PI model with public weights as of 2026-09 (π0.6/π0.7 are closed).","first":false,"discovered":"later","source":"https://github.com/Physical-Intelligence/openpi"}],"entry":null,"notes":"Announced 2025-04-22; weights open-sourced Sept 2025 (pi05_base, pi05_libero, pi05_droid). Still the most capable open-weights PI model. Full fine-tuning needs >70 GB VRAM.","verified":"2026-09-29","body_md":"Sources: [π0.5 blog](https://www.pi.website/blog/pi05), [openpi](https://github.com/Physical-Intelligence/openpi), [LeRobot docs](https://huggingface.co/docs/lerobot/en/pi05).","page_url":"https://postcutoff.com/m/pi-0-5/","standing":{"kind":"robotics","newer_count":26,"newer":[{"id":"praxis-1","name":"Praxis-1","org":"Runway","released":"2026-09-30","page_url":"https://postcutoff.com/m/praxis-1/"},{"id":"figure-helix-2-5","name":"Helix 2.5","org":"Figure AI","released":"2026-09-17","page_url":"https://postcutoff.com/m/figure-helix-2-5/"},{"id":"unifolm-wla-1-0","name":"UnifoLM-WLA-1.0","org":"Unitree Robotics","released":"2026-09-10","page_url":"https://postcutoff.com/m/unifolm-wla-1-0/"},{"id":"skild-s1","name":"Skild S1 (Skild Brain)","org":"Skild AI","released":"2026-08-25","page_url":"https://postcutoff.com/m/skild-s1/"},{"id":"generalist-gen-1-5","name":"Generalist GEN-1.5","org":"Generalist AI","released":"2026-08-19","page_url":"https://postcutoff.com/m/generalist-gen-1-5/"}],"before":{"id":"pi-0-fast","name":"π0-FAST","org":"Physical Intelligence","released":"2025-01-16","page_url":"https://postcutoff.com/m/pi-0-fast/"},"after":{"id":"pi-0-6","name":"π0.6 / π*0.6","org":"Physical Intelligence","released":"2025-11-17","page_url":"https://postcutoff.com/m/pi-0-6/"},"weights":"public","licence":"apache-2.0 (openpi code); weights built on PaliGemma, Gemma terms apply","licence_permissive":false,"summary":"Weights are public. Licence: apache-2.0; weights built on PaliGemma, Gemma terms apply. See the licence for commercial terms."}}