As you are new in the field, it kinda doesn't make sense to pick an older version. It would be better if there was no data than incorrect data. You literally have to include the version number on every prompt and even that doesn't guarantee a right result! Sometimes I have to play truth or dare three times before we finally find the right names and instructions. Yes I have the version info on all custom information dialogs, but it is not as effective as including it in the prompt itself.
Searching the web feels like an on-going "I'm feeling lucky" mode. Anyway, I still happen to get some real insights from GPT4o, even though Gemini 2.5 Pro has proven far superior for larger and more difficult contexts / problems.
The best storytelling ideas have come from GPT 4.5. Looking forward to testing this new 4.1 as well.