Noam Shazeer, co-author of 'Attention Is All You Need' and former Gemini co-lead, is joining OpenAI. He only returned to Google in 2024 via a $2.7 billion Character.AI acquisition.
Key facts
- Shazeer co-authored 'Attention Is All You Need' (2017).
- He returned to Google in 2024 via $2.7B Character.AI deal.
- Second major AI hiring shake-up in 2026 after Karpathy.
- Shazeer co-led Gemini models at Google.
- OpenAI now adds a transformer architecture pioneer.
Noam Shazeer, co-author of the landmark 'Attention Is All You Need' paper and former co-lead of Google's Gemini models, is joining OpenAI. He only returned to Google from Character.AI in 2024 as part of a $2.7 billion deal According to The Decoder. After Andrej Karpathy's move to Anthropic, it's the second major AI hiring shake-up this year.
Shazeer joined Google in 2000, where he worked on improvements including the search engine's spell checker. In 2021, he left to co-found the AI chatbot startup Character.AI. He returned to Google in 2024 as part of a $2.7 billion deal that brought him and co-founder Daniel De Freitas back along with parts of the research team — specifically to improve Google's reasoning models, which still haven't caught up with OpenAI and Anthropic.
Why this matters more than a typical exec shuffle
Shazeer's departure signals that Google's attempts to rebuild its reasoning model team have failed to retain top talent. The $2.7 billion Character.AI acquisition was Google's largest talent bet in 2024, explicitly aimed at closing the reasoning gap with OpenAI and Anthropic [per Google's internal messaging at the time]. Now that bet has lost its centerpiece. For OpenAI, the hire adds a transformer architecture pioneer — Shazeer's 2017 paper spawned the entire LLM industry — as the company faces increasing competition from Anthropic (which filed IPO paperwork this week) and Google's own Gemini models.
A pattern of talent flight
The move mirrors Andrej Karpathy's departure from OpenAI to Anthropic in early 2026, creating a two-way flow of senior researchers between the leading labs. Both Shazeer and Karpathy are among the most cited AI researchers alive. Their defections underscore a structural reality: at the frontier, talent is the scarcest resource, and no lab can lock it in permanently, even with billion-dollar acquisitions.
What to watch
Watch for Google's response — whether it announces a new reasoning model lead or accelerates internal promotion. Also monitor OpenAI's upcoming API pricing cuts (reported June 16) and whether Shazeer's hire signals a shift toward reasoning-focused product features.
Source: the-decoder.com
