If you want to make sure the model is up to date you should include a bunch of data in the prompt - like the k-nearest neighbours in your up to date corpus, or

If you want to make sure the model is up to date you should include a bunch of data in the prompt - like the k-nearest neighbours in your up to date corpus, or API results (time, weather), or fresh search results. The model can be very good at integrating side information you provide. The model without context is just a language processor, not a reliable information store.