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What is openpi built with?

openpi is a Python repo. It uses AI through opencv-python, jax, flax, torch, einops, and 3 more, makes its content with imageio and pillow, validates its data with beartype, and is tested with chex. It has 17,200 written lines, with 14 test files.

Read on November 9, 2026, at commit 215abfb. Read it as markdown

The card says what it's built with. Its whole map opens it up: every part of the code and how it connects to the rest.

Frontend

Interface 1

Backend

AI 8

Support

Content 2

Validation 1

Testing 1

  • chex1 file

Tools 2

  • typing-extensions8 files
  • tyro1 file

Other 10

  • NumPy16 files
  • websockets2 files
  • filelock1 file
  • fsspec1 file
  • msgpack1 file
  • Polars
  • wandb
  • ml-collections1 file
  • dm-tree
  • flatbuffers

Other repos with a similar stack

Ordered by how much of its stack they share with openpi, then by stars.

Frequently asked questions

What language is openpi written in?
openpi is written in Python, with 17,200 written lines.
Does openpi use AI?
Yes. openpi uses AI through opencv-python, jax, flax, torch, einops, transformers, orbax-checkpoint, and sentencepiece.
Does openpi have tests?
Yes. openpi has 14 test files and is tested with chex.
Which repos have a stack like openpi's?
The ones that share most of its stack:ray-project/rayOpenBMB/MiniCPM-Vrun-llama/llama_index

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