I’ve used deep research on Gemini 2 and the results were absolutely incredible. To the point that I was shocked. There was no hallucination, no mistake and did what would take me 4 days of research and did it in under 2 mins. (I’m not saying it can’t or won’t make mistakes or hallucinations at other times for people, but this was clearly so much better than anything else I’d tried). And this wasn’t even the best model. Its Gemini 2. Ive heard chat gpt has a research feature that is much better, although i haven’t tried that. And according to industry folk, gpt 5 is another massive leap forward.
If you havent tried the deep research feature, you absolutely must.
I’ve tried deep research from ChatGPT for legal issues. It’s almost right. But still requires significant human oversight. For example I asked it for a set of norms that govern an issue and some of them were out of date.
I find making sure you give instructions not to hallucinate and take care of timelines is useful.