What is the highest dose of prednisone you ever had?

I’m on day 8 of taking 60mg of Prednisone, but it doesn’t seem to be helping much at the moment. The last times, I started with 60mg and it was fine but it doesn’t seem to be effective anymore. I’m going to see my GI on Monday, but I wanted to ask which doses are helpful for you. How high are your doses? Am I developing an immunity to this medication?

The highest I‘ve ever had were 1000mg per day for three days (3000mg in total), but this was for another condition.