Liam Fedus

Liam Fedus is a machine learning researcher and co-founder of Periodic Labs, a company building AI scientists and autonomous laboratories for materials science research. He previously served as vice president of post-training research at OpenAI, where he was part of the team that developed ChatGPT and contributed to GPT-4. Earlier, he was a research scientist at Google Brain, where he co-authored the Switch Transformer and other work on sparse mixture-of-experts architectures.