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Google Rolls Out Gemini 3 Deep Think to Deliver Advanced Reasoning: How Powerful Is It and Who Can Use It?

Deep Think mode improves complex problem-solving using parallel reasoning and iterative thought, achieving top scores on ARC-AGI-2 and excelling in math and logic benchmarks.

  • On December 05, 2025, Google rolled out Gemini 3 Deep Think to Google AI Ultra subscribers, accessible in the Gemini app via the Tools menu or model dropdown when 'Thinking' is selected.
  • Building on August's Gemini 2.5, Google previewed Deep Think last month with Gemini 3 Pro and allowed extra time in mid-November for safety evaluations and safety testers.
  • The mode uses advanced parallel reasoning to explore multiple hypotheses simultaneously and runs iterative rounds of reasoning that take minutes, producing refined code and visualizations for complex math, science and logic problems.
  • Access is limited to the Google AI Ultra subscription plan priced at $250/month, with demand high as Google says the Gemini app has 650 million monthly users while OpenAI lost 6 percent.
  • Benchmark results show Google says Gemini 3 Deep Think leads ARC-AGI-2, scoring 41.0% on Humanity's Last Exam, while predecessor Gemini 2.5 recently earned gold at the International Mathematical Olympiad and International Collegiate Programming Contest World Finals.
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stadt-bremerhaven.de broke the news in on Thursday, December 4, 2025.
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