Update all examples to use latest openai models

[skrawcz]

We need to replace old model, e.g. gpt-3.5, etc usage with the latest model equivalents.

We need to search the code base and examples and replace these old models with the latest ones.

[abdullahmoosa]

I would like to work on it if it has not already been assigned or finished.

[skrawcz]

I would like to work on it if it has not already been assigned or finished.

sure!