5 Top Google AI Researchers Leave in a Week as Gemini Struggles

Five researchers from Google's core artificial intelligence team have left the company in just seven days, according to reports. The exodus weighed on shares of Alphabet (NASDAQ:GOOGL), which fell 5.09% over the past week to close at $345.29, and dropped another 1.14% on Thursday to $341.34.

Details of the Departures

The five researchers left various AI teams within Google, including the large language model (LLM) team responsible for the Gemini model. Their identities and destinations have not been disclosed.

Context: Gemini Falling Behind

The talent drain comes as Google's Gemini model struggles to keep pace with competitors like OpenAI's GPT-4 and other emerging models, raising questions about Google's ability to maintain its AI leadership.

Market Reaction

Alphabet's stock showed clear negative movement, declining 5.09% in the week ending June 25, 2026, and continuing to fall on Thursday. The decline reflects investor anxiety over the loss of key talent and its potential impact on future AI products.

What This Means for Investors

These developments highlight the risks associated with reliance on human talent in the tech sector. While Alphabet remains a strong company, continued brain drain could affect its long-term competitive edge. Investors should watch for company announcements regarding plans to mitigate these losses.