Google Gemini 3.1 Pro first impressions: a 'Deep Think Mini' with adjustable reasoning on demand

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 ...