Alphabet stock rises, outperforming tech sector amid Gemini AI update

Investing.com -- Alphabet (NASDAQ: GOOGL) stock rose 1% Thursday, bucking the broader tech selloff that saw the Nasdaq 100 fall 1.5%, following news of a major upgrade to its Gemini 3 Deep Think AI system.

The Google parent company announced significant enhancements to its specialized reasoning mode designed to solve complex challenges in science, research, and engineering. The updated version of Gemini 3 Deep Think is now available to Google AI Ultra subscribers through the Gemini app and, for the first time, will be offered via the Gemini API to select researchers and enterprises.

According to the company, the upgraded AI system has achieved impressive benchmarks, including a 48.4% score on "Humanity’s Last Exam" without tools, 84.6% on ARC-AGI-2, and gold-medal level performance on the International Math Olympiad 2025. The system also demonstrated proficiency in chemistry and physics, scoring at gold medal levels on the written sections of the 2025 International Physics and Chemistry Olympiads.

Early testers have already found practical applications for the technology. Lisa Carbone, a mathematician at Rutgers University, used Deep Think to review a technical mathematics paper, where it identified a subtle logical flaw that had previously gone unnoticed in human peer review.

The company emphasized that Deep Think is built not just for theoretical applications but also for practical engineering uses, including the ability to transform sketches into 3D-printable models.

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