Google rolls out Gemini 3 Deep Think mode with its "strongest reasoning capabilities": CEO Sundar Pichai

Google has started rolling out Gemini 3 Deep Think mode to Google AI Ultra subscribers using the Gemini app.

In a post on X, CEO Sundar Pichai highlighted how the new mode can handle highly complex tasks, calling it a feature that “brings our strongest reasoning capabilities yet.” He also shared Gemini’s post on X, which showed an example of its ability to “simulate complex 3D architecture.”



According to a Google blog post, Deep Think mode is built for tough maths, science and logic problems that push the limits of current AI systems. The company said Gemini 3 Deep Think leads key benchmarks such as Humanity’s Last Exam at 41.0% (without tools) and ARC-AGI-2 at 45.1% (with code execution).

Google attributes this performance to advanced parallel reasoning, allowing the model to test several ideas at once. This builds on earlier Gemini 2.5 Deep Think versions that earned gold-medal results at both the International Mathematical Olympiad and the ICPC World Finals.

In the X post by Gemini, it said, “With Deep Think mode, Gemini uses iterative rounds of reasoning, resulting in more refined, nuanced code that helps you visualize, prototype and experiment with noticeably richer detail.”

Ultra subscribers can start using Gemini 3 Deep Think mode now by choosing “Deep Think” in the prompt bar and selecting Gemini 3 Pro from the model menu.