Chai-1 is an AlphaFold 3–inspired model from Chai Discovery, built for predicting the structure of multi-molecule complexes — proteins, ligands, and their interactions. It performs on par with AlphaFold 3 in independent benchmarks. 

Key capabilities:

• Protein-protein or protein-ligand multimer predictions

• Competitive benchmark performance across multimer structure prediction tasks

• Improved quality with fast and private MSA support (GPU-accelerated)

• License: Apache 2.0

Learn more about Chai-1.