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Google DeepMind
Deep Think
Launched Aug 1, 2025
Gemini's most advanced reasoning mode, using parallel streams of thought and returning answers after a few minutes.
- Surface
- App
- Availability
- Generally available
- Plans
- Google AI Ultra
- Retired
- —
Strengths & weaknesses
Strengths
- Parallel hypotheses for hard math, science and coding problems
Weaknesses
- Google AI Ultra only
- Responses take minutes
Launched as Gemini 2.5 Deep Think (early, limited access); Gemini 3 Deep Think 2025-12-04; major upgrade 2026-02-12. A reasoning mode rather than a separate model id.