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I Tested ChatGPT, Gemini, Perplexity, and Grok on Deep Research. One Clear Winner Emerged

Whenever I have to research a specific topic, I naturally turn to the web. However, I don't always have the time to spend hours reading every article out there. Instead, I can ask an AI chatbot to tackle much of the initial work for me.

I Tested ChatGPT, Gemini, Perplexity, and Grok on Deep Research. One Clear Winner Emerged

Whenever I have to research a specific topic, I naturally turn to the web. However, I don't always have the time to spend hours reading every article out there.

Instead, I can ask an AI chatbot to tackle much of the initial work for me. A variety of popular AIs offer a Deep Research mode, which performs online research on your behalf.

What Happened

Just submit a request, and the AI searches the web for any relevant information. It then generates a detailed report, complete with sources.

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Key Details

You can try Deep Research with ChatGPT, Google Gemini, Perplexity AI, and Grok. To put them to the test, I asked each one to research how GPS developed from its military origins to the commercial system we all rely on today.

  • PRESENTED BY Recommended for You What Our Ratings Mean Read Our Editorial Mission Statement and Testing Methodologies.

  • I'm Maggie, PCMag's AI-powered product finder, exclusively powered by our deep library of reviews and buying advice written by our expert team of technology journalists.

  • Thor Jensen, Tom Brant & Jade Chung-Lee Hello!

Why It Matters

Here’s how each AI fared and which one was my favorite. OpenAI’s ChatGPT provides two different versions of Deep Research.

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What Reports Say

Coverage of the story so far points to:

  • Continued reporting by PCMag as more details emerge

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