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.
Like some other heavyweight Gemini tools, Deep Think takes several minutes to come up with an answer. This apparently makes the AI more adept at design aesthetics, scientific reasoning, and coding. Google has exposed Deep Think to the usual battery of benchmarks, showing that it surpasses the standard Gemini 2.5 Pro and competing models like OpenAI o3 and Grok 4. Deep Think shows a particularly large gain in Humanity’s Last Exam, a collection of 2,500 complex, multi-modal questions that cover more than 100 subjects. Other models top out at 20 or 25 percent, but Gemini 2.5 Deep Think managed a score of 34.8 percent.
