I tested the top models from Grok, Gemini, and ChatGPT head to head this morning. Gemini won, showing incredible power at research and sourcing.

The last month has seen some amazing releases from the top AI labs. xAI released Grok 4.1 Thinking, Google released Gemini 3.0 Pro, and OpenAI dropped GPT 5.2.

This got me thinking…if I ran the same prompt through all three, who would win? 

I gave the models a tough question that requires a lot of research: what is causing the massive population decline in Latin America?

This region is seeing some of the fastest decline in birth rate in recorded history. I’m fascinated by the fall in child-bearing across the world, and Latin America is on the front lines.

Let’s see what these models can find out… 

Grok 4.1 Thinking: Lightning Fast, But Imperfect Interface

Grok’s response was very informative, searching over 100 sources in seconds. It still amazes me we can do this!

Grok does a great job of explaining the causes of Latin America’s fertility decline. 

Governments made it easier for teen girls to access long-acting contraception like hormonal implants. The huge decline in teen pregnancies is a major factor pushing down the fertility rate. 

I wish Grok would cite its sources in line with the facts they support. This would make it easier to verify the info.

But when I do click through on Grok’s sources, they check out. Its research abilities are strong, even if the formatting of the citations isn’t perfect. 

I’m giving Grok an A. 

Gemini 3.0 Pro: Superb Research, Clear Presentation

Gemini does an awesome job of citing sources in line with the facts they support. I can easily click the link and verify the information. 

When I open the source page, Gemini even highlights the information it relied on. This is next-level! 

Gemini also gave a great table showing the fertility rates across Latin America. 

A lot of the information is the same as Grok’s. But the better sourcing puts Gemini over the top. 

I’m giving Gemini an A+! 

GPT 5.2: Respectable, But Watch Out for Sourcing Problems

ChatGPT’s latest model gave a strong response, starting with overall fertility numbers and then digging into causes. It noted that three-quarters of Latin American countries are below replacement, an important fact I didn’t see in Grok or Gemini’s response. 

But in terms of sourcing, ChatGPT was the worst of these three models. 

It cites multiple sources for a particular fact, but only allows you to click through on one of them. This seems to be a quirk in the interface, but it makes it hard to verify the information. 

I’m giving GPT 5.2 a B+.

Wrap-Up

Gemini wins this contest, scoring an A+ versus an A for Grok and a B+ for GPT 5.2. Gemini gave a well-reasoned and very useful response, supported by the best sourcing I’ve ever seen.

But what strikes me most is how good all these models are! Even the laggard, GPT 5.2, would have been considered science fiction two years ago. 

I pay for Supergrok and I’m sticking with that for now. Gemini is slightly better, but not enough to switch.

Try all these models and see what they can do. Then, let me know which one is your favorite!

More on tech: 

Can DeepSeek Beat the Best American Models?

My Top 3 Startups from Launch Accelerator Demo Day

Three Easy UX Wins to Make Your Product Better

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