In a significant expansion of its artificial intelligence services, Google has announced the general availability of its Gemini 3 Deep Think mode for all subscribers of its premium Google AI Ultra plan. This move, confirmed on December 4, 2025, marks a crucial step in making Google's most sophisticated reasoning AI accessible to a wider paying audience.
What is Gemini 3 Deep Think Mode?
While the standard Gemini 3 models already possess multimodal reasoning, the newly rolled-out Deep Think mode is engineered for tackling significantly more complex challenges. According to Google's official blog post, this mode leverages the model's further enhanced reasoning capabilities specifically for intricate tasks involving advanced mathematics, scientific problems, and complex logic.
The technology represents a notable leap from its predecessor, the Gemini 2.5 Deep Think. The core advancement lies in its use of advanced parallel reasoning. This allows the AI model to explore and evaluate multiple hypotheses or solution paths simultaneously, rather than sequentially, leading to more robust and accurate outcomes.
The performance metrics underscore its power. In benchmark tests, Gemini 3 Deep Think scored 41% without tools on Humanity's Last Exam. Furthermore, it achieved a 45.1% score with code execution on the challenging Hand ARC-AGI-2 benchmark.
Industry Impact and Competitive Landscape
The broad release of this feature arrives at a pivotal moment. Industry observers note a surge in popularity for Google's AI offerings, with many perceiving that the tech giant has now edged past its rival, OpenAI, to take a leading position in the global AI race.
The competitive tension was palpable soon after Gemini 3's initial debut. Reports indicated that OpenAI CEO Sam Altman declared an internal 'code red' situation, citing "rough vibes" from temporary economic pressures. In response, OpenAI is reportedly fast-tracking the development of a new model, codenamed 'Garlic', aimed at outperforming rivals in coding and reasoning.
Google CEO Sundar Pichai highlighted the rollout on social media platform X, stating, "Gemini 3 Deep Think mode brings our strongest reasoning capabilities yet..." He showcased an example of the AI simulating complex 3D architecture, demonstrating its practical applications.
How to Access and Use Gemini 3 Deep Think
For Indian users subscribed to Google's AI Ultra plan, priced at Rs 24,500 per month, accessing this powerful tool is straightforward. Follow these steps within the Gemini app:
- Open the official Gemini application on your device.
- Look for and select the 'Deep Think' option within the prompt bar.
- From the model selection dropdown menu, choose 'Thinking'.
- Type your complex prompt or question and submit it for processing.
This rollout is part of a broader integration strategy by Google. Notably, Gemini 3 marked the first time Google integrated its latest AI models into its search products from launch day. Separately, the company is also testing a merger of AI Overviews with AI Mode in Search, allowing users to delve deeper into topics with a single click—a feature highlighted by Robby Stein, VP of Google Search.
The availability of Gemini 3 Deep Think to all Ultra subscribers solidifies Google's commitment to delivering top-tier AI reasoning tools to its premium user base, setting a new benchmark in the rapidly evolving landscape of artificial intelligence.
