Overview
- Deep Think appears in the Tools menu when the model dropdown is set to Thinking for users on the AI Ultra tier.
- Google describes Deep Think as its most advanced reasoning mode, using parallel exploration of multiple hypotheses with iterative rounds of reasoning.
- The feature targets complex math, science, and logic tasks, and responses typically take a few minutes to generate.
- Google reports benchmark gains including 41.0% on Humanity’s Last Exam (no tools), 93.8% on GPQA Diamond, and 45.1% on ARC-AGI-2 with code execution.
- The rollout follows Google’s mid-November decision to extend safety evaluations and gather input from safety testers before wider access.