Google released its latest core reasoning model, Gemini 3.1 Pro, on Thursday. Google says that Gemini 3.1 Pro achieved twice the verified performance of 3 Pro on ARC-AGI-2, a popular benchmark that measures a model’s logical reasoning.
Google originally released Gemini 3 and 3 Pro in November, and this new release shows just how fast AI companies are introducing new and updated models. Gemini 3.1 Pro is the new core model powering Gemini and various Google AI tools, such as Gemini 3 Deep Think. Google says it’s designed to provide more creative solutions.
“3.1 Pro is designed for tasks where a simple answer isn’t enough, taking advanced reasoning and making it useful for your hardest challenges,” a Google blog post states. “This improved intelligence can help in practical applications — whether you’re looking for a clear, visual explanation of a complex topic, a way to synthesize data into a single view, or bringing a creative project to life.”
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Here’s everything we know so far about Gemini 3.1 Pro, including how it compares to the latest models from Anthropic and OpenAI, and how to try it yourself.
How to try Gemini 3.1 Pro
Starting today, Google is rolling out Gemini 3.1 Pro in the Gemini App, the Gemini APIA, and in Notebook LM. Free users will be able to try 3.1 Pro in the Gemini app, but paid users on Google AI Pro and AI Ultra plans will have higher usage rates. Within Notebook LM, only these paid users will have access to 3.1 Pro, at least, for now. Coders and enterprise users can also access the new core model via developers and enterprises can access 3.1 through AI Studio, Antigravity, Vertex AI, Gemini Enterprise, Gemini CLI, and Android Studio.
Mashable Light Speed
Gemini 3.1 Pro was already available for Mashable editors using Gemini. To try it for yourself, head to Gemini on desktop or open the Gemini mobile app.
Left: Two results of the same animation prompt. Credit: Google
Right: Credit: Google
Why Gemini 3.1 Pro matters
When Google released Gemini 3 Pro in November, the model was so impressive that it allegedly caused OpenAI CEO Sam Altman to declare a code red. As Gemini 3 Pro surged to the top of AI leaderboards, OpenAI reportedly started losing ChatGPT users to Gemini. The latest core ChatGPT model, GPT-5.2, has tumbled down the rankings on leaderboards like Arena (formerly known as LMArena), losing significant ground to competitors such as Google, Anthropic, and xAI.
Gemini 3 Pro was already outperforming GPT-5.2 on many benchmarks, and with a more advanced thinking model, Gemini could move even further ahead.
Gemini 3.1 Pro: Benchmark performance
Google released benchmark performance data showing that Gemini 3.1 Pro outperforms previous Gemini models, Claude Sonnet 4.6, Claude Opus 4.6, and GPT-5.2. However, OpenAI’s new coding model, GPT-5.3-Codex, beat Gemini 3.1 Pro on the verified SWE-Bench Pro benchmark, according to Google itself.
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