{"id":"723c2abe-101d-4132-bbfb-663c1f517d3e","slug":"pi0","name":"pi0 (and pi0.5)","description":"Physical Intelligence's open VLA flow model. A roughly 3B-parameter VLM backbone produces motor commands at up to 50 Hz across multiple robot platforms. Trained on internet-scale vision-language data, Open X-Embodiment, and Physical Intelligence's dexterous-manipulation dataset. The first robotics foundation model ported to Hugging Face LeRobot, open-sourced in February 2025 via the openpi repository under Apache-2.0. pi0 is the base of a fast-moving lineage: pi0-FAST (an autoregressive variant using the FAST action tokenizer), then pi0.5 (April 2025, open-world generalization, also released open in openpi), and the two newest and currently closed models, pi-star-0.6 (November 2025, which learns from experience via an RL method called Recap) and pi0.7 (April 2026, a roughly 5B-parameter steerable model on a Gemma3 backbone). Physical Intelligence raised a $600M Series B in November 2025 at a reported $5.6B valuation, led by Alphabet's CapitalG with Lux Capital and returning backers including Jeff Bezos, OpenAI, and Thrive Capital.","brainType":"foundation-model","isOpen":true,"maturityStage":"research","architecture":"VLA flow model, roughly 3B-parameter VLM backbone, motor commands at up to 50 Hz, cross-embodiment across 8 platforms: UR5e, Bimanual UR5e, Franka, Bimanual Trossen, Bimanual ARX, Mobile Trossen, Mobile Fibocom. Trained on internet-scale vision-language data, Open X-Embodiment, and Physical Intelligence's dexterous-manipulation dataset. PyTorch and JAX implementations.","reviewStatus":"reviewed","sources":[{"url":"https://github.com/Physical-Intelligence/openpi","label":"Physical Intelligence: openpi repository (primary)","sourceName":"Physical Intelligence (openpi repo)"},{"url":"https://huggingface.co/blog/pi0","label":"Hugging Face Blog: pi0 on LeRobot","sourceName":"Hugging Face"},{"url":"https://www.therobotreport.com/","label":"The Robot Report: pi0 coverage","sourceName":"The Robot Report"},{"url":"https://www.pi.website/research/fast","title":"FAST: Efficient Robot Action Tokenization (the autoregressive pi0-FAST tokenizer)","sourceName":"Physical Intelligence (research)"},{"url":"https://www.pi.website/research/knowledge_insulation","title":"Knowledge Insulation: VLAs that Train Fast, Run Fast, and Generalize Better","sourceName":"Physical Intelligence (research)"},{"url":"https://www.therobotreport.com/physical-intelligence-raises-600m-advance-robot-foundation-models/","title":"Physical Intelligence raises $600M Series B (Nov 2025) at ~$5.6B; CapitalG lead, Lux co-lead","sourceName":"The Robot Report"},{"url":"https://siliconangle.com/2025/11/20/jeff-bezos-backed-physical-intelligence-raises-600m-improve-ai-robot-brains/","title":"Jeff Bezos-backed Physical Intelligence raises $600M to improve its AI robot brains","sourceName":"SiliconANGLE"}],"keyFacts":[{"label":"DEPLOY maturity rationale","value":"Open foundation model in broad developer use; primary use is research/development, so recorded at research maturity."},{"label":"Model lineage (current)","value":"pi0 -> pi0-FAST -> pi0.5 -> pi-star-0.6 (Nov 2025, learns-from-experience via the Recap RL method) -> pi0.7 (Apr 2026, ~5B steerable on Gemma3). No model named 'pi1' exists; the post-pi0.5 line is pi-star-0.6 then pi0.7. These newer models are documented as lineage context, not yet separate registry brains."},{"label":"Open-source status per variant (verified)","value":"OPEN (Apache-2.0, in openpi): pi0 (pi0_base), pi0-FAST (pi0_fast_base), pi0.5 (pi05_base). CLOSED (paper only, no weights): pi-star-0.6, pi0.7. The open/closed line falls AFTER pi0.5."},{"label":"Funding (current)","value":"$600M Series B announced Nov 2025 at a reported ~$5.6B valuation; lead CapitalG (Alphabet), co-lead Lux Capital; returning Jeff Bezos, OpenAI, Thrive, T. Rowe Price, Sequoia. Cumulative ~$1.1B raised (after the ~$400M earlier round). OpenAI participated but did NOT lead."},{"label":"Tuning data efficiency","value":"1 to 20 hours of data sufficient to tune for a new platform."},{"label":"Powered platforms (research, not registry models)","value":"UR5e, Bimanual UR5e, Franka, Bimanual Trossen, Bimanual ARX, Mobile Trossen, Mobile Fibocom. All real-world runs (espresso, laundry, a 59-box factory chocolate-assembly demo) are PI-run RESEARCH demonstrations; no verified third-party/commercial production deployment."},{"label":"Hosted by","value":"Hugging Face LeRobot."},{"label":"Cap-flag (aggregator drift)","value":"'Project Prometheus' is a SEPARATE Bezos AI lab (not Physical Intelligence) - do not merge its $10B/$38B figures into this record. A reported $11B PI valuation (Mar 2026) is reported-only; the confirmed valuation is $5.6B. Benchmark superlatives (pi-star-0.6 '>2x throughput / >90% success', pi0.7 'zero-shot cross-embodiment / emergent capabilities') are PI-self-reported, not independently reproduced."}],"aliases":["pi0","pi-0","pi0.5","pi-zero","openpi"],"collisionRisk":"low","reviewNote":null,"builtOnBrainId":null,"createdAt":"2026-05-28T14:06:07.452Z","updatedAt":"2026-06-04T18:37:20.008Z","jsonLd":{"@context":"https://schema.org","@type":"SoftwareApplication","@id":"https://registry.deploy.report/brains/pi0","url":"https://registry.deploy.report/brains/pi0","name":"pi0 (and pi0.5)","alternateName":["pi0","pi-0","pi0.5","pi-zero","openpi"],"description":"Physical Intelligence's open VLA flow model. A roughly 3B-parameter VLM backbone produces motor commands at up to 50 Hz across multiple robot platforms. Trained on internet-scale vision-language data, Open X-Embodiment, and Physical Intelligence's dexterous-manipulation dataset. The first robotics foundation model ported to Hugging Face LeRobot, open-sourced in February 2025 via the openpi repository under Apache-2.0. pi0 is the base of a fast-moving lineage: pi0-FAST (an autoregressive variant using the FAST action tokenizer), then pi0.5 (April 2025, open-world generalization, also released open in openpi), and the two newest and currently closed models, pi-star-0.6 (November 2025, which learns from experience via an RL method called Recap) and pi0.7 (April 2026, a roughly 5B-parameter steerable model on a Gemma3 backbone). Physical Intelligence raised a $600M Series B in November 2025 at a reported $5.6B valuation, led by Alphabet's CapitalG with Lux Capital and returning backers including Jeff Bezos, OpenAI, and Thrive Capital.","identifier":"723c2abe-101d-4132-bbfb-663c1f517d3e","applicationCategory":"foundation-model","publisher":{"@id":"https://deploy.report/#organization"}},"framework_metadata":{"framework_schema_version":"0.1.0","verification_status":"verified","maturity_stage":"research","lifecycle_state":null,"architectural_position":{"cohort":null,"sub_cohorts":[]},"within_cohort_verified_vs_claimed_pair":null,"cap_flags":[],"verification_depth":{"sources_count":7,"primary_source_types":["code-repository","model-repository","secondary-trade-publication"]}}}