Jack Clark (@jackclarkSF) — Twitter Score 234 out of 1000

Jack Clark is an AI policy expert and researcher who co-founded Anthropic, the AI safety company. Jack Clark's Twitter Score is 234 out of 1000 (an Excellent rating) as of August 2026, ranking #1,740 (top 0.5%) among 483,652 tracked accounts.

Jack Clark co-founded Anthropic and has been a prominent voice in AI policy and safety. Previously, he served as Policy Director at OpenAI, and before that worked as a technical journalist at Bloomberg BusinessWeek and The Register. He was also formerly a founding member of the AI Index at Stanford University, an inaugural member of the National Artificial Intelligence Advisory Committee, and was previously affiliated with the Organization for Economic Co-operation and Development and the Center for a New American Security.

Jack Clark writes Import AI, an AI research newsletter read by 70,000 people each week. He has also authored or co-authored Stanford AI Index reports, including the 2024 Artificial Intelligence Index Report. On the financial side, FTX, the bankrupt cryptocurrency exchange, invested $500 million in Anthropic and later struck $884 million in deals to sell most of its Anthropic shares, subject to bankruptcy court approval. Jack Clark's account has published 32,224 posts and has 140,703 followers as of August 2026. He has been mentioned by 191 accounts, with 394 total mentions.

Who follows Jack Clark on X?

The accounts that follow Jack Clark include 943 founders, 245 angel investors, 252 influencers and 17 VCs. Among his notable followers are Balaji, Sam Altman, Fred Ehrsam, 6529, Haseeb Qureshi and Andrew Kang.