Alphabet Shares Jump as It Unveils Gemini 3.1 Pro in Latest Update to Flagship AI Model

Alphabet shares gained 2% in premarket trading.

Google unveiled the latest update to its flagship Gemini artificial intelligence on Thursday, showcasing Gemini 3.1 Pro.

“Building on the Gemini 3 series, 3.1 Pro represents a step forward in core reasoning,” Google said in a post on its website. “3.1 Pro is a smarter, more capable baseline for complex problem-solving. This is reflected in our progress on rigorous benchmarks. On ARC-AGI-2, a benchmark that evaluates a model’s ability to solve entirely new logic patterns, 3.1 Pro achieved a verified score of 77.1%. This is more than double the reasoning performance of 3 Pro.”

The new model is available starting today for developers via the Gemini API in

Google AI Studio, Gemini CLI, the company's agentic development platform Google Antigravity, and Android Studio. It's also available for enterprises in Vertex AI and Gemini Enterprise and for consumers in the Gemini app and NotebookLM.

On its most recent earnings call, Google parent Alphabet said that Gemini had surpassed 740M monthly active users.