Source: https://seerepo.com/r/OpenPipe/ART
Markdown source: https://seerepo.com/r/OpenPipe/ART.md
Description: OpenPipe/ART is a Python repo with 345,462 lines written. ART is built with FastAPI, AIOHTTP, and weave and uses OpenAI and Anthropic.

# What's inside OpenPipe/ART

OpenPipe/ART is a Python repo with 345,462 lines written. ART is built with FastAPI, AIOHTTP, and weave and uses OpenAI and Anthropic. AI signed 6.6% of the 1,465 commits of ART.

Its description on GitHub: “Agent Reinforcement Trainer: train multi-step agents for real-world tasks using GRPO. Give your agents on-the-job training. Reinforcement learning for Qwen3.6, GPT-OSS, Llama, and more!”

Python · Apache-2.0 · 10,856 stars · GitHub: https://github.com/OpenPipe/ART

Read on November 13, 2026, at commit 534620a.

## More on this repo

- [What is ART built with?](https://seerepo.com/r/OpenPipe/ART/built): ART is built with FastAPI, AIOHTTP, and weave and uses OpenAI and Anthropic.
- [How much of ART did AI write?](https://seerepo.com/r/OpenPipe/ART/ai): AI signed 6.6% of the 1,465 commits of ART.

## In figures

- 345,462 lines written: The ones people and agents wrote: product, tests, schemas and tooling. Generated code doesn’t count.
- 415 product files: The product’s own files. Test files are counted apart.
- 391 test files: The files that test the code.
- 22 technologies: Each service with the file and line that prove it.

SeeRepo read the facts in its code and kept none of it. AI only helps sort its packages and folders by their names, and never sees its code.

## Frequently asked questions

### What is OpenPipe/ART?

OpenPipe/ART is a Python repo with 345,462 lines written. Its description on GitHub: “Agent Reinforcement Trainer: train multi-step agents for real-world tasks using GRPO. Give your agents on-the-job training. Reinforcement learning for Qwen3.6, GPT-OSS, Llama, and more!”

The proof: [its page on GitHub](https://github.com/OpenPipe/ART)

### What is ART built with?

ART is built with FastAPI, AIOHTTP, and weave and uses OpenAI and Anthropic.

The proof: [each service with its file and line](https://seerepo.com/r/OpenPipe/ART/built)

### How much of ART did AI write?

AI signed 6.6% of the 1,465 commits of ART.

The proof: [the commits each tool signed](https://seerepo.com/r/OpenPipe/ART/ai)

### What license does ART have?

ART is released under the Apache-2.0 license.

The proof: [its page on GitHub](https://github.com/OpenPipe/ART)

### How many stars does ART have on GitHub?

ART had 10,856 stars on GitHub on November 13, 2026.

The proof: [its page on GitHub](https://github.com/OpenPipe/ART)

## Add this badge to your README

It links to this page and updates itself each time SeeRepo reads the repo.

```markdown
[![OpenPipe/ART on SeeRepo](https://seerepo.com/badge/OpenPipe/ART.svg)](https://seerepo.com/r/OpenPipe/ART?de=insignia)
```

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.