By Nermeen Nabil Khear 
After OpenAI, Perplexity AI is joining the “deep research” bandwagon. And it’s doing it in a fairly interesting way. Following in the footsteps of DeepSeek‘s “reasoning” model, Perplexity is the first major AI provider that’s offering a Deep Research feature for free users, too. By comparison, OpenAI’s Deep Research feature is only available in the $200/month Pro subscription.
Deep Research is an upcoming AI feature that takes a bit of time, but performs dozens of related searches, goes over hundreds of resources, and uses a reasoning model to logic out each prompt in a step-by-step process. You can get similar results from tools like Copilot’s “Think Deeper” feature, sure, but what sets Deep Research apart is that it puts all of the info it’s collected together into a comprehensive, white paper style report.
Deep Research is free for all logged-in users, though you’re limited to just five queries a day. But if you’re paying for Perplexity Pro (which costs $20/month or $200/year), you get up to 500 queries a month. OpenAI’s Deep Research feature is limited to 100 queries a month for now.
Although, it’s not an apples-to-apples comparison. ChatGPT’s Deep Research feature takes a lot of time. Up to 20 minutes. It asks follow up questions, shows all the complex steps involved in its process, and spits out a very long report at then end. Perplexity’s Deep Research feature is kind of a lite version of that. You get a response in 2-4 minutes, so your results will naturally rely more in searching the web and data collation than deep interpretation on the part of the AI. OpenAI is using its upcoming o3 reasoning model for Deep Research, but Perplexity hasn’t mentioned any details about the model it’s using.
Credit: Perplexity
In Humanity’s Last Exam, a commonly used AI benchmark consisting of over 3,000 questions across a number of topics, Perplexity’s Deep Research scored a 21.1% on accuracy, which is much higher than DeepSeek R1 (8.6%), and Gemini (7.2%). OpenAI’s Deep Research still has the lead with a 26.6% completion score, but a silver medal is respectable here given the tool’s much lower barrier to entry.
So, how does this change how you might use Perplexity? So far, AI chatbots have been all about multiple prompts. You ask a question and prompt again and again to get to detailed answers. But with Deep Research, you can ask a single question and be done with it. The more specific and verbose your prompt, the better the bot’s research and report will be, but the AI can now give you pages of info in response to much less prompting. And once your report is generated, you can download it as a PDF.
Credit: Perplexity
Over on its blog, Perplexity has highlighted multiple examples of the kind of difference Deep Research can make. Where the default model might givee an overview with bullet-point answers, Deep Research will instead come back with multiple paragraphs, detailed reports, and more expanded formatting.
This articles is written by : Nermeen Nabil Khear Abdelmalak
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