Sergey Brin's BIG MISTAKE: Leaving Google Before Gemini! (2026)

Google Co-founder Sergey Brin Reflects on His Return to AI: 'Retiring Before COVID Was a Big Mistake'

By Thibault Spirlet

Google co-founder Sergey Brin, who returned to the company to work on its flagship AI model, Gemini, recently spoke at Stanford University's School of Engineering centennial celebration. During his speech, Brin shared his thoughts on retirement, AI development, and the tech industry's future.

Retirement and the Pandemic

Brin initially stepped back from day-to-day work in December 2019, envisioning a life of leisure, studying physics in cafes. However, the pandemic disrupted his plans, as cafes were no longer an option. This change of circumstances led him to feel 'spiraling' and 'not sharp' without the intellectual stimulation he had always relied on.

Google's AI Trajectory

Brin admitted that Google initially 'underinvested' in AI, allowing rivals to gain an advantage. Despite publishing the groundbreaking 'Transformer' paper in 2017, which underpins most major AI models today, Google was 'too scared' to bring chatbots to the public due to concerns about their performance. This hesitation allowed OpenAI to 'run with it,' as Brin put it, which he considers a positive development.

Google's Competitive Edge

Despite this, Brin acknowledges that Google retains a competitive edge through its long-standing investment in neural-network research, custom AI chips, and massive data center infrastructure. He notes that very few companies have the same scale and resources.

AI Education and Career Choices

When asked about the educational path students should pursue in an AI-dominated era, Brin advised against leaving technical fields. He humorously suggested that even AI might be better at comparative literature than humans. This lighthearted comment highlights the importance of technical expertise in a rapidly changing tech landscape.

The Mistake of Premature Launch

Brin also discussed the biggest mistake founders often make, which he admits he made with Google Glass. He rushed the product to market before it was affordable, polished, or even fully ready. This approach, he said, is a common mistake among entrepreneurs who aspire to be the next Steve Jobs.

The Energy of AI Development

Now deeply involved in Gemini, Brin is energized by the rapid pace of AI development. He emphasizes the astonishing rate of innovation, stating that staying updated requires constant attention to the news. This dynamic environment keeps him motivated and engaged in the field he helped pioneer.

Sergey Brin's BIG MISTAKE: Leaving Google Before Gemini! (2026)

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