Lilian Weng (@lilianweng) — Twitter Score 166 out of 1000

Lilian Weng is an AI researcher and technical writer who co-founded Thinking Machines Lab, an AI research and product company focused on human-AI collaboration, frontier models, and AI safety. Lilian Weng's Twitter Score is 166 out of 1000 (an Excellent rating) as of September 2026, ranking #3,175 (top 1%) among 486,860 tracked accounts.

Lilian Weng previously served as Vice President of Research, Safety at OpenAI, where she founded and led the Applied AI Research team. That team's work spanned the fine-tuning API, embeddings API, moderation endpoints, and applied safety frameworks. She is also a Distinguished Fellow at Fellows Fund.

Lilian Weng is the author of Lil'Log, a technical machine-learning blog she has maintained since 2017 and continues to update actively. The blog covers deep-learning research, reinforcement learning, and AI safety topics in a rigorous yet accessible style, and has built a substantial readership within the ML research community.

Lilian Weng's account has 289,662 followers as of September 2026 and has published 218 posts. She has been mentioned by 39 accounts a total of 55 times.

Lilian Weng's portfolio includes Simular.

Who follows Lilian Weng on X?

The accounts that follow Lilian Weng include 764 founders, 212 angel investors, 168 influencers and 8 VCs. Among her notable followers are Sam Altman, Marc Andreessen, 6529, Andrew Kang, Andrej Karpathy and Georgios Konstantopoulos.