Google introduces the Deep Think reasoning model for Gemini 2.5 Pro and a better 2.5 Flash

Google has started testing a reasoning model called Deep Think for Gemini 2.5 Pro, the company has revealed at its I/O developer conference. According to DeepMind CEO Demis Hassabis, Gemini's Deep Think uses "the latest cutting-edge research" that gives the model the capability to consider multiple hypotheses before responding to queries. Google says it got an "impressive score" when evaluated using questions from the 2025 United States of America Mathematical Olympiad competition. However, Google wants to take more time to conduct safety evaluations and get further input from safety experts before releasing it widely. That's why it's making Deep Think initially available to trusted testers via the Gemini API first in order to get their feedback first.

The company has also introduced a better Gemini 2.5 Flash model, which is optimized for speed and efficiency. It's now more efficient ...