Gemini 3.1 Pro: upgraded core reasoning
Google released Gemini 3.1 Pro in preview, the core model behind the previous week's Gemini 3 Deep Think update, rolling out across the Gemini API, Antigravity, Vertex AI, the Gemini app and NotebookLM.
What happened
Google released Gemini 3.1 Pro, a week after a major Gemini 3 Deep Think update for science, research and engineering.
The technical details
From the post:
- described as the upgraded core intelligence behind those Deep Think results
- a step forward in core reasoning, built on the Gemini 3 series
- rolling out in preview for developers (Gemini API in AI Studio, Gemini CLI, Google Antigravity, Android Studio), enterprises (Vertex AI, Gemini Enterprise) and consumers (Gemini app, NotebookLM)
Why it matters
It shows the pattern of a “deep think” mode built on a base model: improvements to the base flow into both everyday use and the slower reasoning mode. The post’s specific benchmark tables aren’t reproduced here.
Sources
- Gemini 3.1 Pro: A smarter model for your most complex tasks — Google DeepMind
This is a summary written from the linked public sources. Figures and numbers are as reported there.