On Tuesday at Google I/O 2025, the company announced Deep Think, an “enhanced” reasoning mode for its flagship Gemini 2.5 Pro model. Deep Think allows the model to consider multiple answers to questions before responding, boosting its performance on certain benchmarks.

On Tuesday at Google I/O, the company's annual developer conference, Google announced Deep Think, an "enhanced" reasoning mode for Gemini 2.5 Pro that shows "incredible" skill at complex math and coding. The company also announced improvements to Pro as well as Gemini 2.5 Flash, the second of its "most intelligent" models. Here's what's new.