Leo Gao (@nabla_theta) — Twitter Score 40 out of 1000

Leo Gao is an AI alignment researcher who co-founded EleutherAI and currently works at OpenAI as a Member of Technical Staff. Leo Gao's Twitter Score is 40 out of 1000 as of August 2026, ranking #23,392 (top 5%) among 483,944 tracked accounts.

Leo Gao co-founded EleutherAI, the open-source AI research collective, and was among the authors of The Pile, an 800GB diverse text dataset built for language-model training. He also co-authored GPT-NeoX-20B, a large language model whose weights, training code, and evaluation code were released publicly. His early work established a pattern of open, reproducible research in large-scale language modeling.

Leo Gao has contributed to several research efforts at OpenAI, including data work on GPT-4 and a study that trained a 16-million-latent sparse autoencoder on GPT-4 activations across 40 billion tokens, for which he built the autoencoder training codebase and core experiment infrastructure. He has also co-authored research on detecting reward-hacking behavior in reasoning models operating in agentic coding environments, a line of work directly connected to his stated focus on AGI alignment.

Leo Gao has published 2,009 posts on the platform and has been mentioned by 5 accounts a total of 6 times.

Who follows Leo Gao on X?

The accounts that follow Leo Gao include 120 founders, 33 angel investors and 35 influencers, among them Sam Altman, Marc Andreessen, Dan Robinson, Vance Spencer, Eric Wall and Mario Nawfal.