Google Unveils Gemini 3.1 Pro: A 'Deep Think Mini' with Dynamic Adjustable Reasoning for Enterprise AI and Developers
Google has released Gemini 3.1 Pro, an incremental update to its frontier AI model, introducing a significant innovation: a three-tier adjustable thinking system. This feature allows the model to dynamically scale its reasoning effort, effectively transforming it into a lightweight version of Google's specialized Deep Think reasoning system. This marks a shift in Google's release strategy towards more frequent, incremental upgrades. The new low, medium, and high thinking levels provide enterprise AI teams, developers, and IT leaders with a single model capable of handling tasks from quick routine queries to multi-minute deep reasoning for complex problems. Gemini 3.1 Pro is now rolling out in preview across various Google platforms, including the Gemini API, Google AI Studio, Vertex AI, and the consumer Gemini app, offering fine-grained control over computational effort per response.
For the past three months, Google's Gemini 3 Pro has maintained its position as one of the most capable frontier models available. However, in the rapidly evolving AI landscape, three months is a significant period, and competitors have continued to advance. Earlier today, Google launched Gemini 3.1 Pro, an update that introduces a crucial innovation to the company's powerful workhorse model: three levels of adjustable thinking. This effectively transforms it into a lightweight version of Google's specialized Deep Think reasoning system.
This release signifies the first time Google has issued a "point one" update to a Gemini model, indicating a change 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—provides developers and IT leaders with a single model that can dynamically scale its reasoning effort. This allows for quick responses to routine queries and extends to multi-minute deep reasoning sessions for complex problems.
The model is currently rolling out in preview across various platforms. These include 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 most impactful feature in Gemini 3.1 Pro is not a single benchmark number, but rather the introduction of a three-tier thinking level system. This system gives users fine-grained control over the amount of computational effort the model invests in each response. Gemini 3 Pro previously offered only two thinking modes: low and high. The new 3.1 Pro adds a medium setting, which is similar to the previous high setting. Crucially, it also overhauls the meaning of "high." When set to high, 3.1 Pro functions as a "mini version of Gemini Deep Think," which is the company's specialized reasoning model that received an update just last week.