Is 3.15 bigger than Pi?

While comparing Pi to other numbers is straightforward for individuals familiar with its properties, LLMs appear to struggle with this task.
These are very different answers I get from GPT-4.0 and GPT-3.5.
Note
GPT-3.5: 
Note
GPT-4.0: 
So now I have an idea to let GPT-4.0 correct GPT-3.5.

Then I put this correction back to 3.5

