# Chai Discovery

> Chai Discovery builds frontier AI to predict and reprogram the interactions between biochemical molecules. Its flagship Chai-1 is a multi-modal foundation model for biomolecular structure prediction (proteins, small molecules, DNA, RNA, glycans and complexes), and Chai-2 generates de novo antibodies directly from target epitopes. Chai-1 is available as an open-source Python package (Apache 2.0) and as a hosted commercial server.

## Products
- [Chai-1 (chai-lab)](https://github.com/chaidiscovery/chai-lab): SOTA model for biomolecular structure prediction; open-source Python package + weights (Apache 2.0).
- [Chai Design / hosted server](https://lab.chaidiscovery.com): Commercial hosted platform to run predictions without local GPU infrastructure.
- [Chai-2](https://www.chaidiscovery.com/news/chai-2-mab): De novo antibody design system that generates antibodies from target epitopes.

## Packages
- [chai_lab on PyPI](https://pypi.org/project/chai_lab/): pip install chai_lab==0.6.1 (Python 3.10+, Linux, CUDA GPU).

## CLI
- `chai-lab fold input.fasta output_folder` — predict a structure from a FASTA file. Flags: --use-msa-server, --use-templates-server, --msa-server-url.

## Docs
- [Documentation](https://docs.chaidiscovery.com): Chai Design docs (authenticated app).
- [Example scripts](https://github.com/chaidiscovery/chai-lab/tree/main/examples): predict_structure.py, MSA-guided prediction.
- [Technical report (bioRxiv)](https://www.biorxiv.org/content/10.1101/2024.10.10.615955): Chai-1 — Decoding the molecular interactions of life.

## Repositories
- [chaidiscovery/chai-lab](https://github.com/chaidiscovery/chai-lab): Chai-1 model, inference code, and CLI.

## Company
- [Website](https://www.chaidiscovery.com): Company site.
- [News](https://www.chaidiscovery.com/news): Announcements and partnership news.
- [Careers](https://www.chaidiscovery.com/careers)
- [Terms of Service](https://www.chaidiscovery.com/terms-of-service)
- [Privacy Policy](https://www.chaidiscovery.com/privacy-policy)

## Provenance
- method: generated
- generated: 2026-07-18
- source: apis.yml + chai-discovery repo artifacts (no published /llms.txt found on docs host)