Andrew Tulloch Departs Thinking Machines Labs to Join Meta
The Wall Street Journal confirmed on Saturday, October 11, 2025, the departure of Andrew Tulloch from Thinking Machines Labs to join Meta. He departs saying: " I have decided to pursue a different path for personal reasons."
Thinking Machines Labs is an artificial intelligence startup founded in February 2025 by Mira Murati in San Francisco. Mira Murati's early journey began when she joined OpenAI as Vice President of Applied AI and partnership before becoming Chief Technology Officer (CTO) in May, 2020. She was named the interim Chief Executive Officer (CEO) of OpenAI in 2023 but was replaced by Emmett Shear after 3 days and returned to the CTO role. Emmett was replaced after 5 day by the original CEO, Sam Altman. By September 2024, Mira announced she was stepping down as CTO before founding Thinking Machines Labs with Andrew Tulloch and other OpenAI researchers in February 2025
Andrew Tulloch is an AI researcher and co-founded of Thinking Machines Labs, where he served as a member of Technical Staff. Before this, he worked as a Strategist at Goldman Sachs from November 2010 to February 2012, a Distinguished Engineer at Facebook from April 2012 to September 2023, and a Member of Technical Staff at OpenAI from October 2023 to November 2024.
In August 2025, Tulloch reportedly turned down a $1.5 billion compensation package for over six years from Meta CEO Mark Zuckerberg. This offer came CEO Mira Murati rejected Meta's attempt to acquire Thinking Machines Labs.
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