Google Integrates Gemini 2.5 Pro AI Model into Deep Research for Paid Users

The upgraded model enhances analytical reasoning and report generation, while free users remain on the older Gemini 2.0 Flash Thinking model.

Google has rolled out its Gemini 2.5 Pro Experimental model to power the Deep Research tool, now available exclusively to Gemini Advanced (paid) subscribers.
Free-tier users continue to access Deep Research via the older Gemini 2.0 Flash Thinking model, which offers less advanced capabilities.
The Gemini 2.5 Pro model introduces integrated reasoning, making it the first in the Gemini series to feature native 'Thinking' capabilities.
Internal tests and human feedback indicate significant improvements in analytical reasoning, information synthesis, and report generation compared to competitors like ChatGPT.
Despite the advancements, the Deep Research tool lacks certain features, such as the ability to upload external files, which some competitors currently offer.