Barret Zoph, the Thinking Machines co-founder who returned to OpenAI, is now at Google as VP of Research

Walking through Zoph's trajectory over the past two-plus years reveals just how surreal the top AI talent market has become. Zoph spent two years at OpenAI and left in October 2024 to co-found AI startup Thinking Machines with Mira Murati, who had departed the lab the month prior — a company that quickly became one of the hottest startups in AI. In January 2026, Zoph and fellow co-founder Luke Metz dramatically departed Thinking Machines to return to OpenAI; it was later revealed that Zoph had actually been fired, not a voluntary returnee. His 'return' did not stick for long either: this time Zoph spent only about five months at OpenAI, tasked with heading AI enterprise sales, and left again in June. Now his next stop is confirmed — Vice President of Research at Google.

Why does Google value Zoph so highly? The answer is hidden in the spokesperson's words: reinforcement learning and post-training expertise. In the current AI competitive landscape, architecture gaps are narrowing, and what determines a model's ceiling increasingly depends on the post-training phase — RL, alignment, data curation and fine-tuning strategy. Zoph is a veteran in this domain: he has been involved in training and post-training frontier models across OpenAI and Thinking Machines, leaving technical fingerprints everywhere. By slotting an expert with both startup experience and familiarity with frontier lab processes into the Gemini team, Google is clearly doubling down on the post-training track. For Google, the Gemini team is in a critical phase of hand-to-hand combat with OpenAI and Anthropic — an executive who knows RL cold brings not just technique but first-hand experience with frontier training methods.

Zoph's move, viewed against the broader backdrop, is a microcosm of accelerating talent flow in the AI industry. Since 2026, top AI talent has been moving between labs, startups and giants at an increasingly fast pace: some left OpenAI to found companies, some returned from startups to big tech, and some like Zoph completed a full 'OpenAI — startup — OpenAI — Google' loop. This churn is a sign of a healthy industry — top talent searching for the position where they create the most value; but it also reflects the white-hot nature of AI competition: every giant is desperately filling its technical gaps, and talent is the scarcest resource. For Google, landing Zoph is a shrewd deal: one executive position in exchange for one of the most senior voices in RL. For Zoph, the Google VP of Research seat offers a stage where he can keep digging deep into the technical frontier without shouldering startup risk.