Overview
- The new mode is live in the Gemini app, where paying users can select Deep Think in the prompt bar and choose Gemini 3 Pro to enable it.
- Deep Think uses advanced parallel reasoning with iterative rounds to handle multi‑step math, science, and logic problems, with responses that can take minutes.
- Google reports 41.0% on Humanity’s Last Exam without tools and 45.1% on ARC‑AGI‑2 with code execution, with ARC Prize verification cited for ARC‑AGI‑2.
- Sundar Pichai called it the company’s strongest reasoning capability to date and highlighted an example generating a complex 3D architectural simulation.
- The release expands Gemini 3’s higher‑reasoning options within Google’s broader ecosystem, following limited previews and safety evaluations before wider availability.