It already refuses to answer to some questions. I wanted to know the mechanism of action of a medication and GPT did not want to answer me, I had to work around

It already refuses to answer to some questions. I wanted to know the mechanism of action of a medication and GPT did not want to answer me, I had to work around it by telling it that I am doing research or it is for university. Like come on, I can't even ask the mechanism of action of medications? This is just one example, there are lots of censorship going on around the models. Which ones are less censored? Are free & open source ones even censored at all or would they answer? I imagine they would. GPT and Claude may not answer so the company can save their asses, so local ones should probably work.