Gemini 3 Deep Think
Google · 2026-02-12
Gemini 3 Deep Think is Google's hosted specialized reasoning mode for complex science, mathematics, coding, and engineering problems; the February 2026 update is built on Gemini 3.1 Pro and is currently labeled Gemini 3.1 Deep Think on Google DeepMind's model page. Google released that update on February 12, 2026 to AI Ultra subscribers in the Gemini app and offered it through an early-access Gemini API program for select researchers, engineers, and enterprises. Deep Think uses parallel reasoning to explore multiple hypotheses, and this row represents the February 2026 hosted mode rather than a separately released checkpoint.