According to @demishassabis, Google AI Ultra subscribers can now access Gemini 3 Deep Think mode in the Gemini app, with product details provided in Google’s official blog. According to Google Blog, Deep Think is designed for multi-step reasoning with extended deliberation time, enabling complex planning, code generation, and data analysis tasks that benefit from longer context and chain-of-thought style internal processing. As reported by Google Blog, early access is limited to AI Ultra tier users inside the Gemini app, signaling a premium monetization path for advanced reasoning features and positioning Gemini 3 against OpenAI’s o3 and Anthropic’s Claude Opus in enterprise-grade reasoning benchmarks. According to Google Blog, business use cases include multi-source research synthesis, financial modeling, and long-form content structuring, and the rollout suggests opportunities for SaaS vendors to integrate Deep Think via Google’s ecosystem for higher accuracy workflows like RFP drafting and compliance review. As reported by Google Blog, the feature emphasizes reliability safeguards and usage guidance for longer inference times, implying higher per-query costs but potentially improved task completion rates for knowledge work and developer productivity.