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openpi (Physical Intelligence)

Open-source weights and code for pi0, pi0-FAST and pi0.5 vision-language-action models

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What openpi (Physical Intelligence) does

  • Open-source weights and code for pi0, pi0-FAST and pi0.5 vision-language-action models
  • Fine-tuning recipes for new robots and tasks
  • Apache-2.0

openpi (Physical Intelligence) — straight answers

What is openpi (Physical Intelligence)?

openpi (Physical Intelligence) is listed under Robotics & Embodied AI, in the AI Models & Local Execution category on Flocci AI Tools. Open-source weights and code for pi0, pi0-FAST and pi0.5 vision-language-action models. It is free, with no paid plan attached, and it lives at github.com.

Is openpi (Physical Intelligence) free?

openpi (Physical Intelligence) is listed as fully free — there is no paid tier attached to it in the catalog. That makes it one of the 399 entries on Flocci AI Tools with no upgrade path built in.

What can openpi (Physical Intelligence) do?

openpi (Physical Intelligence) does 3 things the catalog singles out: Open-source weights and code for pi0, pi0-fast and pi0.5 vision-language-action models; fine-tuning recipes for new robots and tasks; apache-2.0.

What is the best free alternative to openpi (Physical Intelligence)?

Genesis is the closest free alternative: it sits in the same Robotics & Embodied AI sub-category and is free. LeRobot (Hugging Face), MuJoCo and NVIDIA Cosmos also start free. The full list is on the alternatives page.

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openpi (Physical Intelligence) alternatives

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LeRobot (Hugging Face)

Robotics & Embodied AI
free
  • Open PyTorch library for training real-world robot control policies (ACT, Diffusion Policy, VLA models)
  • Direct integration with Hugging Face Hub for sharing datasets and pretrained robot policies
  • Works with low-cost hobbyist robot arms (SO-100/101), not just simulation
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NVIDIA Isaac GR00T

Robotics & Embodied AI
free
  • Open, Apache-2.0-licensed vision-language-action foundation model for generalist humanoid robots (GR00T N1.7)
  • Opened to all developers worldwide Apr 2026 (previously partner-only), running on DGX Cloud
  • Full pipeline: pretrained model + simulation fine-tuning + deployment tools, not just a research checkpoint
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Genesis

Robotics & Embodied AI
free
  • Unified multi-physics simulation engine plus photorealistic renderer for robotics/embodied-AI training, fully open source
  • 30,000+ GitHub stars, actively updated as recently as Aug 2026
  • Pythonic API designed to be dramatically faster than prior simulators for RL/robot-policy training
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NVIDIA Cosmos

Robotics & Embodied AI
freeNew
  • Open platform of world foundation models, datasets and tools for physical AI
  • Cosmos Predict, Transfer and Reason models on Hugging Face
  • Generates and reasons over synthetic robotics and driving video
  • Open weights under NVIDIA open license
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NVIDIA Isaac Lab

Robotics & Embodied AI
freeNew
  • GPU-accelerated framework for robot reinforcement and imitation learning on Isaac Sim
  • Ready environments for humanoids, manipulators and legged robots
  • BSD-3-Clause open source
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MuJoCo

Robotics & Embodied AI
freeNew
  • Fast, accurate physics engine for robotics and biomechanics research
  • Python bindings, MJX on GPU/TPU via JAX
  • Apache-2.0
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Head-to-head comparisons

openpi (Physical Intelligence) vs LeRobot (Hugging Face)openpi (Physical Intelligence) vs NVIDIA Isaac GR00Topenpi (Physical Intelligence) vs Genesisopenpi (Physical Intelligence) vs NVIDIA Cosmosopenpi (Physical Intelligence) vs NVIDIA Isaac Labopenpi (Physical Intelligence) vs MuJoCo