Is it true that you have A/B exp where 2 different GPT-4 models are userd?

Here is example, my friend had plus version before release and ask him question:
Is there live on the Mars?
And answer was - according data from March 2023 - No
And when I ask same question from GPT-4 what it answer? According data from Sep 2021 - No!

I have screens, but new users can only provide embbeded materials

So what is going on here? I also want to use fresh model!

Today my friend also get response with inform from Sep 2021, so probably it was mistake of developers with training data and it was removed