However, in order to try out the new model users will need to hand over $250 a month for a Google AI Ultra subscription.Starting today, subscribers get access to a fixed set of prompts for the new model. They can enable “Deep Think” by toggling it in the prompt bar when selecting Gemini 2.5 Pro from the model dropdown menu in the Gemini app.

Google's new AI feature, Deep Think, is now available for Gemini app users subscribed to the Google AI Ultra tier

Deep Think is based on the same foundation as Gemini 2.5 Pro, but it increases the "thinking time" with greater parallel analysis. According to Google, Deep Think explores multiple approaches to a problem, even revisiting and remixing the various hypotheses it generates. This process helps it create a higher-quality output.