Source: https://seerepo.com/r/verl-project/verl/built
Markdown source: https://seerepo.com/r/verl-project/verl/built.md
Description: verl is a Python repo built with FastAPI and uvicorn. It uses AI through transformers, accelerate, datasets, and einops.

# What is verl built with?

verl is a Python repo built with FastAPI and uvicorn. It uses AI through transformers, accelerate, datasets, and einops, makes its content with av and pylatexenc, is tested with pytest-asyncio, pytest-rerunfailures, and Pytest, and uses pyarrow. It has 187,062 written lines, with 304 test files.

Read on November 4, 2026, at commit 7454326.

Repository: https://github.com/verl-project/verl

## Backend

### The base

- **[FastAPI](https://seerepo.com/uses/fastapi)**: 2 files

### Data

- **pyarrow**

### AI

- **transformers**: 36 files
- **accelerate**: 3 files
- **datasets**: 1 file
- **einops**: 1 file

## Support

### The base

- **uvicorn**: 2 files

### Content

- **av**
- **pylatexenc**: 1 file

### Testing

- **pytest-asyncio**
- **pytest-rerunfailures**
- **Pytest**: 172 files

### Tools

- **pre-commit**
- **tensorboard**
- **packaging**: 19 files

### Other

- **hydra-core**
- **NumPy**: 35 files
- **pandas**: 5 files

## Other repos with a similar stack

- [Significant-Gravitas/AutoGPT](https://seerepo.com/r/Significant-Gravitas/AutoGPT/built): FastAPI, pyarrow, uvicorn, pylatexenc · [Compare](https://seerepo.com/compare/Significant-Gravitas/AutoGPT/vs/verl-project/verl)
- [QwenAudio/CosyVoice](https://seerepo.com/r/QwenAudio/CosyVoice/built): FastAPI, pyarrow, uvicorn, transformers · [Compare](https://seerepo.com/compare/QwenAudio/CosyVoice/vs/verl-project/verl)
- [open-webui/open-webui](https://seerepo.com/r/open-webui/open-webui/built): FastAPI, pyarrow, uvicorn · [Compare](https://seerepo.com/compare/open-webui/open-webui/vs/verl-project/verl)
- [langflow-ai/langflow](https://seerepo.com/r/langflow-ai/langflow/built): FastAPI, pyarrow, uvicorn · [Compare](https://seerepo.com/compare/langflow-ai/langflow/vs/verl-project/verl)
- [Comfy-Org/ComfyUI](https://seerepo.com/r/Comfy-Org/ComfyUI/built): transformers, einops, av · [Compare](https://seerepo.com/compare/Comfy-Org/ComfyUI/vs/verl-project/verl)
- [harry0703/MoneyPrinterTurbo](https://seerepo.com/r/harry0703/MoneyPrinterTurbo/built): FastAPI, uvicorn, av · [Compare](https://seerepo.com/compare/harry0703/MoneyPrinterTurbo/vs/verl-project/verl)

## Frequently asked questions

### What language is verl written in?

verl is written in Python, with 187,062 written lines.

### What framework does verl use?

verl is built with FastAPI and uvicorn.

### Does verl use AI?

Yes. verl uses AI through transformers, accelerate, datasets, and einops.

### What services does verl use?

verl uses pyarrow.

### Does verl have tests?

Yes. verl has 304 test files and is tested with pytest-asyncio, pytest-rerunfailures, and Pytest.

### Which repos have a stack like verl's?

The ones that share most of its stack: Significant-Gravitas/AutoGPT, QwenAudio/CosyVoice, and open-webui/open-webui.

## 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.