Gemini 2.5 Pro is Google's state-of-the-art reasoning model, designed for advanced coding, mathematics, and scientific tasks that demand deep analytical thinking. It employs built-in "thinking" capabilities that enable step-by-step reasoning through complex problems with enhanced accuracy, and achieved first place on the LMArena leaderboard upon release, reflecting superior human-preference alignment. With a 1M-token context window and multimodal input support, it excels at complex problem-solving, long-document analysis, and research-grade workflows requiring the highest level of reasoning depth.