Mar 2025
Gemini 2.5 Pro — Google's Thinking Model Tops Coding Leaderboards
Google released Gemini 2.5 Pro Experimental, a thinking model that immediately ranked first on the LMArena (formerly LMSys) leaderboard and set new records on the WebDev Arena benchmark for generating web applications. It was widely praised for producing complex, functional interactive web apps from natural language descriptions with high accuracy. The model supported a one-million-token context window and offered competitive API pricing relative to OpenAI's reasoning models.
Why it mattersTopping coding leaderboards with a thinking model signals that structured reasoning is now the default expectation for developer-facing AI tools, not a premium add-on.
Try itSubmit your most complex code generation or refactoring task to Gemini 2.5 Pro and measure whether its thinking trace helps you catch edge cases your current model misses.