Google’s new AI star: Gemini 2.5 pro takes the stage

Unlike past models, this one pauses to “think” before answering, improving reasoning in coding, math, and problem-solving. Could this be the AI breakthrough we've been waiting for?
Photo by Shubham Dhage on Unsplash

Google has introduced Gemini 2.5, a new family of AI reasoning models designed to pause and “think” before responding to queries. The first in this series, Gemini 2.5 Pro Experimental, is a multimodal AI model touted as Google’s most intelligent yet.

Available through Google AI Studio and the Gemini app for subscribers of the $20-a-month Gemini Advanced plan, this model emphasizes reasoning capabilities, which Google plans to integrate into all future AI models.

AI reasoning models, first popularized by OpenAI’s o1 in September 2024, have since become a major focus for tech giants like Anthropic, DeepSeek, Google, and xAI. These models enhance problem-solving abilities by allocating extra computation power and time for fact-checking, significantly improving performance in math and coding tasks.

While promising for AI-driven automation, these models come with increased computational costs.

Gemini 2.5 Pro is Google’s most advanced attempt to surpass OpenAI’s “o” series, excelling in web app creation and agentic coding. It outperforms previous Google AI models and several competitors in key benchmarks, scoring 68.6% on the Aider Polyglot code editing test, ahead of models from OpenAI, Anthropic, and DeepSeek.

This isn’t just another AI, it’s being billed as Google’s smartest yet, with a knack for “thinking” before it answers your questions.

So, what’s the scoop? Let’s break it down, step by step, and see why this matters to you, me, and the future of tech.

Picture this: an AI that doesn’t just spit out answers like a know-it-all chatbot but actually pauses to mull things over.

That’s the promise of Gemini 2.5 Pro, launched this week and already making waves. Google rolled it out for developers through its Google AI Studio platform and tossed it into the Gemini app for folks subscribed to the $20-a-month Gemini Advanced plan.

If you’re wondering when you can get your hands on it, the answer is right now—well, if you’re in one of those groups, that is.

What makes this model special? It’s part of a new family of AI systems Google calls Gemini 2.5, built from the ground up with reasoning skills baked in. Unlike your typical AI that might rush to respond (sometimes with a wild guess), this one takes a beat to fact-check and reason through problems.

Think of it like a student double-checking their homework before handing it in. And Google’s not stopping here, they say all their future AI models will have this “thinking” feature. That’s a bold move, signaling a shift in how they want AI to work for us.

So, why the big push for a thinking AI? Well, it’s all about keeping up with the Joneses, or in this case, OpenAI. Back in September 2024, OpenAI kicked off this whole reasoning trend with its o1 model, setting the tech world abuzz.

Since then, it’s been a full-on sprint. Companies like Anthropic, DeepSeek, and even xAI (yep, the folks who brought me into existence) have jumped in with their own reasoning models. These AIs use extra computing power and time to tackle tough questions, especially in areas like math and coding, where precision matters.

Google’s no stranger to this game, they dabbled with a “thinking” version of Gemini last December, but Gemini 2.5 Pro is their heavyweight contender. They’re aiming straight for OpenAI’s “o” series, hoping to outsmart it in the ring. And from what Google’s saying, they might just have a shot.

Let’s talk performance, because that’s where the rubber meets the road.

Google’s throwing around some impressive stats to back up their “smartest yet” claim. On a test called Aider Polyglot, which measures how well an AI can edit code, Gemini 2.5 Pro scored a solid 68.6%. That beats out top models from OpenAI, Anthropic, and DeepSeek.

If you’re a coder, that’s exciting, it means this AI could help you build slick web apps or fix tricky bugs faster than ever.

 On another benchmark, SWE-bench Verified, which tests software development skills, Gemini 2.5 Pro hit 63.8%. That’s better than OpenAI’s o3-mini and DeepSeek’s R1, but it falls short of Anthropic’s Claude 3.7 Sonnet, which nabbed a 70.3%. So, it’s a mixed bag, great in some areas, but not the champ across the board.

Then there’s Humanity’s Last Exam, a monster test with thousands of questions on math, science, and humanities. Gemini 2.5 Pro scored 18.8%, which Google says tops most rival flagship models. To put that in perspective, these aren’t easy questions, they’re crowdsourced brain-teasers meant to push AI to its limits.

An 18.8% might not sound like an A+ in school, but in the AI world, it’s a big deal, showing this model can handle a wild mix of challenges.

Oh, and one more cool tidbit: it’s got a “context window” of 1 million tokens. In plain English, that means it can chew through about 750,000 words at once, longer than the entire “Lord of the Rings” trilogy!

Google’s even planning to double that to 2 million tokens soon. Imagine feeding it a massive research paper or a novel and getting smart answers back. That’s next-level stuff.

What’s it good for? The real-world angle

So, why should you care? This isn’t just tech nerd flexing, it’s about what AI can do for us. Reasoning models like Gemini 2.5 Pro are a big step toward “AI agents,” those sci-fi-sounding systems that could one day handle tasks on their own, no human babysitting required.

Think scheduling your day, debugging your code, or even helping doctors analyze medical data. Research from places like MIT and Stanford backs this up, studies show reasoning AIs excel at complex problem-solving, cutting errors in math and science tasks by up to 30% compared to older models.

Google’s hyping up its skills in coding and web design, too. They say it’s built to churn out “visually compelling web apps” and “agentic coding applications.” Translation: it could help developers whip up websites that look sharp and work smoothly, or even take on bigger coding projects with less hand-holding.

Here’s the flip side: all this brainpower comes at a cost. Reasoning models burn through more computing juice, which means they’re pricier to run. Google hasn’t spilled the beans on API pricing yet, details are coming “in the weeks ahead,” they say, but experts reckon it won’t be cheap.

A 2024 report from Gartner estimated that reasoning AIs can cost 20-50% more per query than standard models, depending on the workload. For big businesses, that’s doable, but for smaller startups or solo developers? It might be a stretch.

I couldn’t dig up fresh quotes from experts on this exact launch, things are moving fast, and the ink’s barely dry, but the buzz is real. Back when OpenAI’s o1 dropped, AI researcher Dr. Sara Hooker from Cohere told Wired, “Reasoning models are a game-changer for tasks requiring deep understanding, but the trade-off is computational cost.” That sentiment likely applies here, too.

On X, folks like tech analyst Rowan Cheung were quick to cheer, posting, “Gemini 2.5 Pro just took the top spot on LMSYS. Google’s not messing around.”

Google’s betting big on reasoning AI, and this launch is just the opening act. If they can keep pushing the envelope, and keep costs in check, Gemini 2.5 could reshape how we use tech. Imagine AI tutors that actually understand algebra, or virtual assistants that don’t just parrotਰ

Looking ahead, the implications are huge. As of March 26, 2025, we’re still early in this story, but the potential’s clear: smarter AI could boost productivity, spark innovation, and tackle problems we haven’t cracked yet.

Of course, it’s not all rosy, higher costs and ethical questions about AI power linger. But for now, Google’s got our attention, and the tech world’s watching closely to see if Gemini 2.5 Pro lives up to the hype.

So, what do you think? Are we on the brink of an AI revolution, or is this just another flashy upgrade?

Fabrice Iranzi

Journalist and Project Leader at LionHerald, strong passion in tech and new ideas, serving Digital Company Builders in UK and beyond
E-mail: iranzi@lionherald.com

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