Liam Fedus (@LiamFedus) — Twitter Score 113 out of 1000

Liam Fedus is an AI researcher who co-founded Periodic Labs, a startup building AI scientists and autonomous laboratories with an initial focus on the physical sciences. Liam Fedus's Twitter Score is 113 out of 1000 (an Excellent rating) as of October 2026, ranking #6,115 (top 5%) among 498,348 tracked accounts.

Liam Fedus previously served as VP of Post Training at OpenAI, where, per Felicis, he drove advances in ChatGPT and Operator. TechCrunch identifies him as one of the researchers who helped create ChatGPT and reports that he led the team behind the first trillion-parameter neural network. He also previously worked at Google Brain. Liam Fedus is currently a Distinguished Fellow at Fellows Fund.

Liam Fedus has 41,530 followers as of October 2026 and has published 1,330 posts. Periodic Labs announced a $300 million seed round on September 30, 2025, led by Andreessen Horowitz, with participation from Felicis, DST Global, NVIDIA, Accel, Elad Gil, Eric Schmidt, Jeff Dean, and Jeff Bezos as backers of the company. Among Periodic Labs' stated research goals are discovering higher-temperature superconductors and developing custom agents for a semiconductor manufacturer. Liam Fedus has been mentioned by 38 accounts a total of 63 times.

Who follows Liam Fedus on X?

The accounts that follow Liam Fedus include 428 founders, 138 angel investors, 62 influencers and 11 VCs, among them Sam Altman, Marc Andreessen, Fred Ehrsam, 6529, Andrej Karpathy and Garry Tan.