Stephanie Palazzolo is an AI reporter at The Information and author of the AI Agenda newsletter, covering artificial intelligence startups, Big Tech, chips, cloud, and policy. A former Morgan Stanley investment banker who pivoted into journalism, she broke major stories on OpenAI, Anthropic, and the broader AI industry, and was part of a SABEW Best in Business award-winning team for coverage of the OpenAI CEO firing in 2023.
Kelsey Piper is an American journalist and effective altruism advocate best known for her work at Vox's Future Perfect newsletter, where she spent seven years covering AI safety, global catastrophic risks, evidence-based philanthropy, and education policy. She broke major stories including OpenAI's non-disparagement agreements and conducted the first post-collapse interview with Sam Bankman-Fried. In August 2025, she left Vox to co-found The Argument, a Substack newsletter focused on reasoned policy debate. A Stanford Symbolic Systems graduate who pledged 30% of her lifetime income to charity, Piper brings a rare combination of technical fluency, ethical rigor, and accessibility to some of the most consequential questions of our time.
Brendan Gregg is an Australian systems performance engineer at OpenAI, where he works on datacenter optimizations for ChatGPT. He invented flame graphs and the USE Method, pioneered eBPF observability, and is the author of landmark books including 'Systems Performance: Enterprise and the Cloud'. His work is credited with saving the industry over $1 billion in compute costs. Previously an Intel Fellow and performance engineering leader at Netflix, Gregg is one of the most influential engineers in Linux and cloud infrastructure.
Charlie Guo is a Stanford and YC alum who turned a personal obsession with AI into a 23,000-subscriber newsletter and a Developer Experience role at OpenAI. Through Artificial Ignorance at ignorance.ai, he writes at the intersection of software engineering and artificial intelligence - cutting through hype to deliver practical, hands-on insights for builders. He has co-founded multiple startups (ClassOwl, FanHero, Crowdmade), published a book of startup interviews called Unscalable, and created a widely-used Python library for Gmail with 1.8k GitHub stars - all while teaching himself AI engineering through relentless experimentation.
Josh Tobin is a machine learning infrastructure pioneer who spent three years as a research scientist at OpenAI - contributing to the famous Rubik's cube robot hand - before earning his PhD from UC Berkeley under Pieter Abbeel. He co-founded Gantry, an ML monitoring and continual learning startup that raised $28.3M, and created Full Stack Deep Learning, the first course focused on production ML engineering. His domain randomization technique, which transfers neural networks trained in simulation to the real world, has been cited over 600 times and reshaped how robotics teams build perception systems. He runs a newsletter focused on ML infrastructure and ops.
Sam Altman is the CEO of OpenAI, the company behind ChatGPT, and one of the most consequential figures in the artificial intelligence era. A Stanford dropout who built his first startup at 19, Altman ran Y Combinator for five years before going all-in on OpenAI's mission to build safe superintelligence. He survived a dramatic 5-day ouster from his own company in 2023, returned to thunderous employee support, and has since steered OpenAI to a $300 billion valuation. He holds no equity in OpenAI, yet built a $3+ billion personal fortune through early bets on Reddit, Stripe, Airbnb, and a cluster of deep-tech moonshots.
On March 31, 2026, OpenAI closed the largest private funding round in history — $122 billion in committed capital at a post-money valuation of $852 billion. Anchored by Amazon ($50B), Nvidia ($30B), and SoftBank ($30B), with continued participation from Microsoft and a sweeping syndicate of global institutions, the round dwarfs every prior private tech raise and cements OpenAI as the world's most valuable startup by a wide margin. The company is generating $2 billion in monthly revenue, counting 900 million weekly ChatGPT users, and is widely expected to pursue an IPO.