In my experience, when I asked Gemini very niche knowledge questions, it did better than GPT-5.1 (I assume 5.2 is similar).

Don’t get me wrong Gemini 3 is very impressive! It just seems to always need to give you an answer, even if it has to make it up.

This was also largely how ChatGPT behaved before 5, but OpenAI has gotten much much better at having the model admit it doesn’t know or tell you that the thing you’re looking for doesn’t exist instead of hallucinating something plausible sounding.

Recent example, I was trying to fetch some specific data using an API, and after reading the API docs, I couldn’t figure out how to get it. I asked Gemini 3 since my company pays for that. Gemini gave me a plausible sounding API call to make… which did not work and was completely made up.