Gemini 3 Deep Think is an advanced reasoning capability integrated into Google's Gemini 3 Pro model. It's designed for complex problem-solving, multi-step planning, and in-depth analysis, going beyond standard AI responses by breaking down challenges into structured steps, evaluating various solutions, and validating its logic. This makes it suitable for tasks demanding deep analysis, such as complex planning, debugging, research synthesis, and strategic decision-making. Gemini 3 Deep Think leverages a large context window of 1 million tokens, allowing it to process vast amounts of information from entire codebases to lengthy documents.
Gemini 3 Deep Think is developed by Google DeepMind. Key features include multi-level, in-depth reasoning, self-checking and validation, and robust multimodal understanding. It utilizes parallel reasoning to explore multiple hypotheses simultaneously. Google AI Ultra subscribers can access Gemini 3 Deep Think within the Gemini app. As of December 2025, a Gemini AI Ultra subscription, which includes Deep Think, costs $250 per month. Lower cost options are available that do not include Gemini 3 Deep Think. As of February 2026, Gemini 3 Deep Think is available to Google AI Ultra subscribers and also via the Gemini API to select researchers, engineers, and enterprises through an early access program.
