Gemini 2.5 Pro Deep Research is better
For the past few days, I have been heavily experimenting with the Gemini 2.5 Pro and Perplexity Pro Deep Research tools, and my conclusion is that Gemini's Deep Research is far better than that of Perplexity or even OpenAI and Grok.
For example, I asked Perplexity to give me a list of events from Indian history with proper reference URLs and most of the events happen to be correct but reference URLs are wrong, broken, and non-existent most of the time. On the other hand, Gemini's research is solid and all the reference URLs are perfectly working as well.
And this is just one example, in almost every case, Gemini 2.5 Pro Deep Research was far better than any other Deep Research tools available as of now.