[Feature] Control thinking behaviour with ThinkingLevels in Gemini 3 Pro models #4983
Description
Gemini models engage in dynamic thinking by default, automatically adjusting the amount of reasoning effort based on the complexity of the user's request.
However, if you have specific latency constraints or require the model to engage in deeper reasoning than usual, you can optionally use parameters to control thinking behaviour.
Documentation: link
Notes:
- You cannot disable thinking for Gemini 3 Pro. Gemini 2.5 series models don't support thinkingLevel; use thinkingBudget instead.
- Settings are mutually exclusive