Chai Discovery
Chai Discovery
Foundation models for molecular structure and antibody design.
Chai Discovery builds foundation models for drug discovery — Chai-1 for biomolecular structure prediction across proteins, ligands, DNA/RNA, and glycans, and Chai-2 for de novo antibody design. Chai-1 weights and inference code are released for non-commercial use, and a free web server runs the model in-browser. It is both a model provider and a usable platform.
Worth knowing
OpenAI-backed; raised a $130M Series B at a ~$1.3B valuation in Dec 2025, co-led by Oak HC/FT and General Catalyst.
- protein-structure
- antibody-design
- drug-discovery
- open-weights