For the past three months, Google’s Gemini 3 Pro has held its ground as one of the most capable frontier models available. But in the fast-moving world of AI, three months is a lifetime — and competitors have not been standing still.Earlier today, Google released Gemini 3.1 Pro, an update that brings a key innovation to the company’s workhorse power model: three levels of adjustable thinking that effectively turn it into a lightweight version of Google’s specialized Deep Think reasoning system.The release marks the first time Google has issued a “point one” update to a Gemini model, signaling a shift in the company’s release strategy from periodic full-version launches to more frequent incremental upgrades. More importantly for enterprise AI teams evaluating their model stack, 3.1 Pro’s new three-tier thinking system — low, medium, and high — gives developers and IT leaders a single model that can scale its reasoning effort dynamically, from quick responses for routine queries up to multi-minute deep reasoning sessions for complex problems.The model is rolling out now in preview across the Gemini API via Google AI Studio, Gemini CLI, Google’s agentic development platform Antigravity, Vertex AI, Gemini Enterprise, Android Studio, the consumer Gemini app, and NotebookLM.The ‘Deep Think Mini’ effect: adjustable reasoning on demandThe most consequential feature in Gemini 3.1 Pro is not a single benchmark number — it is the introduction of a three-tier thinking level system that gives users fine-grained control over how much computational effort the model invests in each response.Gemini 3 Pro offered only two thinking modes: low and high. The new 3.1 Pro adds a medium setting (similar to the previous h …
