There would be significant changes from 4 to 5, but sadly I haven’t had any improvement if clarifying version.

Clarifying can help but ultimately it was trained on older versions. When you are working with a changing api, it's really important that the llm can see examples of the new api and new api docs. Adding context7 as a tool is hugely helpful here. Include in your rules or prompt to consult context7 for docs. https://github.com/upstash/context7